13 December 2013 was a Friday the 13th. 13 December 2013 was the

347th day of the year.MathBabbler Number Analyst (MBNA) output: ========================================= 347 is a natural, whole, integer 347 is odd 347 proper divisors are: 1, 347 has 1 proper divisors 347 is deficient (sum of divisors is 1; ratio: 0.00288184) 347 is unhappy 347 is a Squarefree Number 347 is not a Harshad number 347 is prime ...Safe prime with 173 ...Sexy prime with 353 ...Sexy Triplet prime with 353, 359 ...Twin prime with 349 ...Truman Gerald prime with 317 ...OEIS:002145 (4n+3; n=86) ...reversible prime with 743 ...Left-truncatable ...Eisenstein ...prime triplet {347, 349, 353} 347 is Friedman 347 is ThurmNumber 347 in octal is 0533 347 in hexadecimal is 0x15b 347 in binary is 101011011 (is evil) 347 nearest square numbers: -23...14 (324...361 [19]) sqrt(347) = 18.6279 ln(347) = 5.84932 log(347) = 2.54033 347 reciprocal is .00288184438040345821325648414985 347! is 2.90738e+732 347 is 110.454 Pi years 347 is 17 score and 7 years 347 written as a Roman numeral is CCCXLVII 347 = 174^2 - 173^2 and 174 + 173 = 347

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

**Created:** 13 December 2013

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