This nBAB about the number

`was BAB#`

139`for the fall 2009 semester.`

139MathBabbler Number Analyst (MBNA) output: ========================================= 139 is a natural, whole, integer 139 is odd 139 proper divisors are: 1, 139 is deficient (sum of divisors is 1) 139 is happy 139 is not a Harshad number 139 is prime ...Twin prime with 137 ...OEIS:002145 (4n+3; n=34) ...Right-truncatable 139 is the sum of 5 consecutive primes 139 = 19 + 23 + 29 + 31 + 37 139 in octal is 0213 139 in hexadecimal is 0x8b 139 in binary is 10001011 (is evil) 139 nearest square numbers: -18...5 (121...144 [12]) sqrt(139) = 11.7898 ln(139) = 4.93447 log(139) = 2.14301 139 reciprocal is .00719424460431654676258992805755 139! is 9.61572e+238 139 is 44.2451 Pi years 139 is 6 score and 19 years 139 written as a Roman numeral is CXXXIX

`is a triple-X Roman numeral.`

139

**Creator:** Gerald Thurman
[gthurman@gmail.com]

**Created:** 29 November 2009

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