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Interesting facts about the number 91

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Asteroids

(91) Aegina is asteroid number 91. It was discovered by E. J. M. Stephan from Marseille Observatory on 11/4/1866.

Aircrafts and flights

09/05/2005 the Mandala Airlines plane, flight number 091, Boeing 737-230 crashed in Medan, Indonesia 95 passengers and 5 crew members died.

Areas, mountains and surfaces

The total area of Wrangel Island (Vrangelya) is 3,037 square miles (7,866 square km). Country Russia (Chukotka Autonomous Okrug). 91th largest island in the world.

Distances

There is a 91 miles (146 km) direct distance between Beirut (Lebanon) and Homs (Syria).

There is a 57 miles (91 km) direct distance between Bursa (Turkey) and İstanbul (Turkey).

There is a 57 miles (91 km) direct distance between Casablanca (Morocco) and Sale (Morocco).

There is a 91 miles (146 km) direct distance between Homs (Syria) and Ra’s Bayrūt (Lebanon).

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There is a 57 miles (91 km) direct distance between Chandigarh (India) and Ludhiāna (India).

There is a 91 miles (146 km) direct distance between Luoyang (China) and Xinxiang (China).

There is a 91 miles (145 km) direct distance between Shanghai (China) and Shangyu (China).

There is a 91 miles (145 km) direct distance between Shangyu (China) and Suzhou (China).

Games

History and politics

Literature

The ISBN Group Identifier for books published in Sweden. Example book: ISBN 91-1-811692-2 Torgny Lindgren, Ormens väg på hälleberget, P.A. Norstedt (1982)

Mathematics

Mobile and telephony

Number 91 or +91 or 0091 is a dial the international call prefix for India. (00/+) is dial the international call prefix.

Science

Protactinium is the chemical element in the periodic table that has the symbol Pa and atomic number 91.

Sports

The best athletes to wear number 91
Sergei Fedorov, NHL; Kevin Greene, NFL; Dennis Rodman, NBA; Bob Kurland, Olympic basketball

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What is 91 in other units

The decimal (Arabic) number 91 converted to a Roman number is XCI. Roman and decimal number conversions.
The number 91 converted to a Mayan number is  

 
Decimal and Mayan number conversions.  

Weight conversion
91 kilograms (kg) = 200.6 pounds (lbs)
91 pounds (lbs) = 41.3 kilograms (kg)
Length conversion
91 kilometers (km) equals to 56.545 miles (mi).
91 miles (mi) equals to 146.450 kilometers (km).
91 meters (m) equals to 146.450 feet (ft).
91 feet (ft) equals 27.737 meters (m).
91 centimeters (cm) equals to 35.8 inches (in).
91 inches (in) equals to 231.1 centimeters (cm).
Temperature conversion
91° Fahrenheit (°F) equals to 32.8° Celsius (°C)
91° Celsius (°C) equals to 195.8° Fahrenheit (°F)
Power conversion
91 Horsepower (hp) equals to 66.92 kilowatts (kW)
91 kilowatts (kW) equals to 123.74 horsepower (hp)
Time conversion (hours, minutes, seconds, days, weeks)
91 seconds equals to 1 minute, 31 seconds
91 minutes equals to 1 hour, 31 minutes

Codes and images of the number 91 Number 91 morse code: ----. .----
Sign language for number 91:

Number 91 in braille:

Images of the number  
Image (1) of the number   Image (2) of the number  

 

 
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Number 91 infographic

 

Year 91 AD

Pliny the Younger was named a tribunus plebis.

Gregorian, Hebrew, Islamic, Persian and Buddhist Year (Calendar) Gregorian year 91 is Buddhist year 634.
Buddhist year 91 is Gregorian year 452 a. C.
Gregorian year 91 is Islamic year -547 or -546.
Islamic year 91 is Gregorian year 709 or 710.
Gregorian year 91 is Persian year -532 or -531.
Persian year 91 is Gregorian 712 or 713.
Gregorian year 91 is Hebrew year 3851 or 3852.
Hebrew year 91 is Gregorian year 3669 a. C.
The Buddhist calendar is used in Sri Lanka, Cambodia, Laos, Thailand, and Burma. The Persian calendar is the official calendar in Iran and Afghanistan.

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Advanced math operations Is Prime?
The number 91 is not a prime number. The closest prime numbers are 89, 97.
The 91st prime number in order is 467.
Factorization and factors (dividers)
The prime factors of 91 are 7 * 13
The factors of 91 are 1, 7, 13, 91.
Total factors 4.
Sum of factors 112 (21).

Prime factor tree

Powers
The second power of 912 is 8.281.
The third power of 913 is 753.571.
Roots
The square root √91 is 9,539392.
The cube root of 3√91 is 4,497941.
Logarithms
The natural logarithm of No. ln 91 = loge 91 = 4,51086.
The logarithm to base 10 of No. log10 91 = 1,959041.
The Napierian logarithm of No. log1/e 91 = -4,51086.

Trigonometric functions The cosine of 91 is -0,994367.
The sine of 91 is 0,105988.
The tangent of 91 is -0,106588.

Properties of the number 91

, , , , , ,

Number 91 in Computer Science

Code typeCode value
ASCII Html   [ Opening/Left square bracket [
(ISO 8859-1 Characters)  
Unix time   Unix time 91 is equal to Thursday Jan. 1, 1970, 12:01:31 a.m. GMT  
IPv4, IPv6   Number 91 internet address in dotted format v4 0.0.0.91, v6 ::5b  
91 Decimal   = 1011011 Binary  
91 Decimal   = 10101 Ternary  
91 Decimal   = 133 Octal  
91 Decimal   = 5B Hexadecimal (0x5b hex)  
91 BASE64   OTE=  
91 MD5   54229abfcfa5649e7003b83dd4755294  
91 SHA1   4cd66dfabbd964f8c6c4414b07cdb45dae692e19  
91 SHA224   f0ef5d4592ab606e059053579d0bbfa3b58c2789bcf83487c7db70e6  
91 SHA256   1da51b8d8ff98f6a48f80ae79fe3ca6c26e1abb7b7d125259255d6d2b875ea08  
91 SHA384   b101c4aa51e2b4c5b1bc0cd24037bb579520fb50433493df3db57157774da5724a1cc14b27a0dd34fa6fe5bce908e914  
 

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Numerology 91

According to Wikipedia, numerology is based on faith, yet many people seek the meaning of the number 91 from a numerological perspective.
More about numerology 91 ...

№ 91 in other languages

How to say or write the number ninety-one in Spanish, German, French and other languages.
Spanish:   🔊 (número 91)  

noventa y uno

 
German:   🔊 (Nummer 91)  

einundneunzig

 
French:   🔊 (nombre 91)  

quatre-vingt-onze

 
Portuguese:   🔊 (número 91)  

noventa e um

 
Hindi:   🔊 (संख्या 91)  

इक्यानवे

 
Chinese:   🔊 (数 91)  

九十一

 
Arabian:   🔊 (عدد 91)  

واحد و تسعون

 
Czech:   🔊 (číslo 91)  

devadesát jedna

 
Korean:   🔊 (번호 91)  

구십일

 
Danish:   🔊 (nummer 91)  

enoghalvfems

 
Hebrew:   (מספר 91)  

תשעים ואחת

 
Dutch:   🔊 (nummer 91)  

eenennegentig

 
Japanese:   🔊 (数 91)  

九十一

 
Indonesian:   🔊 (jumlah 91)  

sembilan puluh satu

 
Italian:   🔊 (numero 91)  

novantuno

 
Norwegian:   🔊 (nummer 91)  

nitti-en

 
Polish:   🔊 (liczba 91)  

dziewięćdzisiąt jeden

 
Russian:   🔊 (номер 91)  

девяносто один

 
Turkish:   🔊 (numara 91)  

doksanbir

 
Thai:   🔊 (จำนวน 91)  

เก้าสิบเอ็ด

 
Ukrainian:   🔊 (номер 91)  

дев'яносто один

 
Vietnamese:   🔊 (con số 91)  

chín mươi mốt

 
 

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Frequently asked questions about the number 91

How do you write the number 91 in words?

91 can be written as "ninety-one".

Number 91 in News

NASA: NASA to Provide Coverage of Progress 91 Launch, Space Station Docking

NASA will provide live launch and docking coverage of a Roscosmos cargo spacecraft delivering approximately three tons of food, fuel, and supplies for the crew aboard the International Space Station. The unpiloted Roscosmos Progress 91 spacecraft is scheduled to launch at 4:24 p.m. EST, Thursday, Feb. 27 (2:24 a.m. Baikonur …

Feb. 24, 2025

 
BBC: Man, 91, given artificial cornea in England first

Cecil Farley, 91, says: "It makes life fuller when your eyes work properly." ...

June 4, 2024

 
NyTimes: Peter Magubane, 91, Who Fought Apartheid With His Camera, Is Dead

He documented the cruelties of white South African rule, and he was made to pay for it, enduring beatings and 586 consecutive days in solitary confinement.

Jan. 1, 2024

 
BBC: Ukraine war: Holocaust survivor aged 91 among Mariupol's civilian dead - reports

The woman reportedly died in a basement more than 80 years after surviving the city's Nazi occupiers.

April 20, 2022

 
BBC: Couple married for 91 years and still in love

Yemeni Jews Shama’a and Zechariah married young and survived extreme poverty and persecution together.

Feb. 14, 2022

 

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