About the Number 347 (three hundred forty-seven)

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

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