316987257 has 4 divisors (see below), whose sum is σ = 422649680. Its totient is φ = 211324836.

The previous prime is 316987249. The next prime is 316987273. The reversal of 316987257 is 752789613.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 316987257 - 2³ = 316987249 is a prime.

It is a super-2 number, since 2×316987257² = 200961842200768098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (316987207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52831207 + ... + 52831212.

It is an arithmetic number, because the mean of its divisors is an integer number (105662420).

Almost surely, 2^316987257 is an apocalyptic number.

It is an amenable number.

316987257 is a deficient number, since it is larger than the sum of its proper divisors (105662423).

316987257 is a wasteful number, since it uses less digits than its factorization.

316987257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105662422.

The product of its digits is 635040, while the sum is 48.

The square root of 316987257 is about 17804.1359520759. The cubic root of 316987257 is about 681.8370575607.

The spelling of 316987257 in words is "three hundred sixteen million, nine hundred eighty-seven thousand, two hundred fifty-seven".