317887 has 2 divisors, whose sum is σ = 317888. Its totient is φ = 317886.

The previous prime is 317857. The next prime is 317903. The reversal of 317887 is 788713.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 317887 - 2¹⁵ = 285119 is a prime.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158943 + 158944.

It is an arithmetic number, because the mean of its divisors is an integer number (158944).

2³¹⁷⁸⁸⁷ is an apocalyptic number.

317887 is a deficient number, since it is larger than the sum of its proper divisors (1).

317887 is an equidigital number, since it uses as much as digits as its factorization.

317887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 34.

The square root of 317887 is about 563.8146858676. The cubic root of 317887 is about 68.2481561489.

The spelling of 317887 in words is "three hundred seventeen thousand, eight hundred eighty-seven".