317885 has 4 divisors (see below), whose sum is σ = 381468. Its totient is φ = 254304.

The previous prime is 317857. The next prime is 317887. The reversal of 317885 is 588713.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 588713 = 43 ⋅13691.

It can be written as a sum of positive squares in 2 ways, for example, as 228484 + 89401 = 478^2 + 299^2 .

It is a cyclic number.

It is not a de Polignac number, because 317885 - 2¹⁰ = 316861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 317885.

It is not an unprimeable number, because it can be changed into a prime (317887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31784 + ... + 31793.

It is an arithmetic number, because the mean of its divisors is an integer number (95367).

2³¹⁷⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

317885 is a deficient number, since it is larger than the sum of its proper divisors (63583).

317885 is an equidigital number, since it uses as much as digits as its factorization.

317885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63582.

The product of its digits is 6720, while the sum is 32.

The square root of 317885 is about 563.8129122324. The cubic root of 317885 is about 68.2480130198.

The spelling of 317885 in words is "three hundred seventeen thousand, eight hundred eighty-five".