317979902 has 4 divisors (see below), whose sum is σ = 476969856. Its totient is φ = 158989950.

The previous prime is 317979901. The next prime is 317979919. The reversal of 317979902 is 209979713.

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

It is a super-2 number, since 2×317979902² = 202222436151859208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317979901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79494974 + ... + 79494977.

It is an arithmetic number, because the mean of its divisors is an integer number (119242464).

Almost surely, 2^317979902 is an apocalyptic number.

317979902 is a deficient number, since it is larger than the sum of its proper divisors (158989954).

317979902 is a wasteful number, since it uses less digits than its factorization.

317979902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158989953.

The product of its (nonzero) digits is 214326, while the sum is 47.

The square root of 317979902 is about 17831.9909712853. The cubic root of 317979902 is about 682.5480397516.

The spelling of 317979902 in words is "three hundred seventeen million, nine hundred seventy-nine thousand, nine hundred two".