### About the Number 129 (one hundred twenty-nine)

This nBAB for the number `129` 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.]

```   MathBabbler 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 )
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 