317986 has 4 divisors (see below), whose sum is σ = 476982. Its totient is φ = 158992.

The previous prime is 317983. The next prime is 317987. The reversal of 317986 is 689713.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 216225 + 101761 = 465^2 + 319^2 .

It is a super-2 number, since 2×317986² = 202230192392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (317983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79495 + ... + 79498.

2³¹⁷⁹⁸⁶ is an apocalyptic number.

317986 is a deficient number, since it is larger than the sum of its proper divisors (158996).

317986 is a wasteful number, since it uses less digits than its factorization.

317986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158995.

The product of its digits is 9072, while the sum is 34.

The square root of 317986 is about 563.9024738375. The cubic root of 317986 is about 68.2552402869.

The spelling of 317986 in words is "three hundred seventeen thousand, nine hundred eighty-six".