317857 has 2 divisors, whose sum is σ = 317858. Its totient is φ = 317856.

The previous prime is 317839. The next prime is 317887. The reversal of 317857 is 758713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 314721 + 3136 = 561^2 + 56^2 .

It is an emirp because it is prime and its reverse (758713) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 317857 - 2⁷ = 317729 is a prime.

It is a Chen prime.

317857 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (317827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158928 + 158929.

It is an arithmetic number, because the mean of its divisors is an integer number (158929).

2³¹⁷⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

317857 is a deficient number, since it is larger than the sum of its proper divisors (1).

317857 is an equidigital number, since it uses as much as digits as its factorization.

317857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5880, while the sum is 31.

The square root of 317857 is about 563.7880807538. The cubic root of 317857 is about 68.2460091500.

The spelling of 317857 in words is "three hundred seventeen thousand, eight hundred fifty-seven".