317998 has 16 divisors (see below), whose sum is σ = 516096. Its totient is φ = 146520.

The previous prime is 317987. The next prime is 318001. The reversal of 317998 is 899713.

It is a super-2 number, since 2×317998² = 202245456008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1315 + ... + 1537.

It is an arithmetic number, because the mean of its divisors is an integer number (32256).

2³¹⁷⁹⁹⁸ is an apocalyptic number.

317998 is a deficient number, since it is larger than the sum of its proper divisors (198098).

317998 is a wasteful number, since it uses less digits than its factorization.

317998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279.

The product of its digits is 13608, while the sum is 37.

The square root of 317998 is about 563.9131138748. The cubic root of 317998 is about 68.2560988704.

The spelling of 317998 in words is "three hundred seventeen thousand, nine hundred ninety-eight".