317989942 has 4 divisors (see below), whose sum is σ = 476984916. Its totient is φ = 158994970.

The previous prime is 317989939. The next prime is 317989957. The reversal of 317989942 is 249989713.

It is a happy number.

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

It is a super-2 number, since 2×317989942² = 202235206426326728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 317989942.

It is a congruent number.

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, 79497484 + ... + 79497487.

It is an arithmetic number, because the mean of its divisors is an integer number (119246229).

Almost surely, 2^317989942 is an apocalyptic number.

317989942 is a deficient number, since it is larger than the sum of its proper divisors (158994974).

317989942 is a wasteful number, since it uses less digits than its factorization.

317989942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158994973.

The product of its digits is 979776, while the sum is 52.

The square root of 317989942 is about 17832.2724855807. The cubic root of 317989942 is about 682.5552233400. Note that the first 3 decimals are identical.

The spelling of 317989942 in words is "three hundred seventeen million, nine hundred eighty-nine thousand, nine hundred forty-two".