This nBAB for the number

`was created to complete the nBAB 120-`

129`interval. In addition,`

129`was the smallest number that didn't have a nBAB. [After the posting of this nBAB, 130 became the smallest number not having a nBAB.]`

129MathBabbler Number Analyst (MBNA) output: ========================================= 129 is a natural, whole, integer 129 is odd 129 proper divisors are: 1,3,43, 129 is deficient (sum of divisors is 47) 129 is happy 129 is not a Harshad number 129 is not prime 129 has the prime factors: 3*43 (sum=46) 129 is semiprime (biprime or 2-almost prime) 129 sum of prime factors is: 46 129 is a lucky number 129 is the sum of 10 consecutive primes 129=2+3+5+7+11+13+17+19+23+29 129 in octal is 0201 129 in hexadecimal is 0x81 129 in binary is 10000001 (is evil) 129 nearest square numbers: -8...15 (121...144 [12]) sqrt(129) = 11.3578 ln(129) = 4.85981 log(129) = 2.11059 129 reciprocal is .00775193798449612403100775193798 129! is 4.9745e+217 129 is 41.062 Pi years 129 is 6 score and 9 years 129 written as a Roman numeral is CXXIX

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

**Created:** 29 November 2009

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