About the Number 1,091 (one thousand ninety-one)

This nBAB for the number 1091 was created because a nBAB for the number 1901 was posted. 1901 and 1091 are reversible prime numbers.

MathBabbler Number Analyst (MBNA) output:
=========================================
1091 is a natural, whole, integer
1091 is odd
1091 proper divisors are: 1,
1091 has 1 proper divisors
1091 is deficient (sum of divisors is 1; ratio: 0.00091659)
1091 is unhappy
1091 is a Squarefree Number
1091 is prime (not composite)
...Cousin prime with 1087
...Sexy prime with 1097
...Sexy Triplet prime with 1097, 1103
...Sexy Quadruple prime with 1097, 1103, 1109
...Twin prime with 1093
...Truman Gerald prime with 1061
...OEIS:002145 (4n+3; n=272)
...reversible prime with 1901
...Right-truncatable
...Eisenstein
...prime triplet {1087, 1091, 1093}
...prime triplet {1091, 1093, 1097}
1091 is the sum of 3 distinct cubes (3^3 + 4^3 + 10^3)
1091 is Arithmetic (A003601)
1091 in octal is 02103
1091 in hexadecimal is 0x443
1091 in binary is 10001000011 (is evil)
1091 nearest square numbers: -2...65 (1089...1156 [34])
sqrt(1091) = 33.0303
ln(1091) = 6.99485
log(1091) = 3.03782
1091 reciprocal is .00091659028414298808432630614115
1091! is 2.34185e+2842
1091 is 347.276 Pi years
1091 is 54 score and 11 years
1091 written as a Roman numeral is MXCI
1091 is 546^2 - 545^2 and 546 + 545 = 1091
1091 is a multiple of 1 & it contains a 1 (A011531)

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 26 March 2015

Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 United States License.