317981402 has 4 divisors (see below), whose sum is σ = 476972106. Its totient is φ = 158990700.

The previous prime is 317981393. The next prime is 317981453. The reversal of 317981402 is 204189713.

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., 248409121 + 69572281 = 15761^2 + 8341^2 .

It is a super-2 number, since 2×317981402² = 202224344035771208, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79495349 + ... + 79495352.

Almost surely, 2^317981402 is an apocalyptic number.

317981402 is a deficient number, since it is larger than the sum of its proper divisors (158990704).

317981402 is a wasteful number, since it uses less digits than its factorization.

317981402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158990703.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 317981402 is about 17832.0330304764. The cubic root of 317981402 is about 682.5491130065.

The spelling of 317981402 in words is "three hundred seventeen million, nine hundred eighty-one thousand, four hundred two".