This nBAB for the number

`was the last BAB posted in 2009 and it was BAB#`

2647`.`

2647MathBabbler Number Analyst (MBNA) output: ========================================= 2647 is a natural, whole, integer 2647 is odd 2647 proper divisors are: 1, 2647 is deficient (sum of divisors is 1) 2647 is unhappy 2647 is not a Harshad number 2647 is prime ...OEIS:002145 (4n+3; n=661) ...Super ...Left-truncatable 2647 is a lucky number 2647 is the sum of 29 consecutive primes 29 + 31 + 37 + 41 + 43 + 47 + 53 + 59 + 61 + 67 + 71 + 73 + 79 + 83 + 89 + 97 + 101 + 103 + 107 + 109 + 113 + 127 + 131 + 137 + 139 + 149 + 151 + 157 + 163 2647 in octal is 05127 2647 in hexadecimal is 0xa57 2647 in binary is 101001010111 (is odious) 2647 nearest square numbers: -46...57 (2601...2704 [52]) sqrt(2647) = 51.449 ln(2647) = 7.88118 log(2647) = 3.42275 2647 reciprocal is .00037778617302606724593879863996 2647! is inf 2647 is 842.566 Pi years 2647 is 132 score and 7 years 2647 written as a Roman numeral is MMDCXLVII

`= 1324^2 - 1323^2 and 1324 + 1323 =`

2647`.`

2647

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

**Created:** 31 December 2009

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