317655839 has 2 divisors, whose sum is σ = 317655840. Its totient is φ = 317655838.

The previous prime is 317655827. The next prime is 317655869. The reversal of 317655839 is 938556713.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-317655839 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 317655793 and 317655802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317655809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158827919 + 158827920.

It is an arithmetic number, because the mean of its divisors is an integer number (158827920).

Almost surely, 2^317655839 is an apocalyptic number.

317655839 is a deficient number, since it is larger than the sum of its proper divisors (1).

317655839 is an equidigital number, since it uses as much as digits as its factorization.

317655839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 47.

The square root of 317655839 is about 17822.9020925325. The cubic root of 317655839 is about 682.3160924424.

The spelling of 317655839 in words is "three hundred seventeen million, six hundred fifty-five thousand, eight hundred thirty-nine".