This nBAB for the number

1091was created because a nBAB for the number 1901 was posted. 1901 and1091arereversibleprime 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

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