317992 has 8 divisors (see below), whose sum is σ = 596250. Its totient is φ = 158992.

The previous prime is 317987. The next prime is 318001. The reversal of 317992 is 299713.

It can be written as a sum of positive squares in only one way, i.e., 236196 + 81796 = 486^2 + 286^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×317992² = 202237824128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19867 + ... + 19882.

2³¹⁷⁹⁹² is an apocalyptic number.

It is an amenable number.

317992 is a deficient number, since it is larger than the sum of its proper divisors (278258).

317992 is a wasteful number, since it uses less digits than its factorization.

317992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39755 (or 39751 counting only the distinct ones).

The product of its digits is 3402, while the sum is 31.

The square root of 317992 is about 563.9077938812. The cubic root of 317992 is about 68.2556695814.

The spelling of 317992 in words is "three hundred seventeen thousand, nine hundred ninety-two".