317388842 has 4 divisors (see below), whose sum is σ = 476083266. Its totient is φ = 158694420.

The previous prime is 317388839. The next prime is 317388853. The reversal of 317388842 is 248883713.

It is a happy number.

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., 272217001 + 45171841 = 16499^2 + 6721^2 .

It is a super-2 number, since 2×317388842² = 201471354052201928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 317388793 and 317388802.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79347209 + ... + 79347212.

Almost surely, 2^317388842 is an apocalyptic number.

317388842 is a deficient number, since it is larger than the sum of its proper divisors (158694424).

317388842 is a wasteful number, since it uses less digits than its factorization.

317388842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158694423.

The product of its digits is 258048, while the sum is 44.

The square root of 317388842 is about 17815.4102394528. The cubic root of 317388842 is about 682.1248714286.

The spelling of 317388842 in words is "three hundred seventeen million, three hundred eighty-eight thousand, eight hundred forty-two".