318690131 has 2 divisors, whose sum is σ = 318690132. Its totient is φ = 318690130.

The previous prime is 318690079. The next prime is 318690149. The reversal of 318690131 is 131096813.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 318690131 - 2¹⁸ = 318427987 is a prime.

It is a super-2 number, since 2×318690131² = 203126799193594322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (318690161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159345065 + 159345066.

It is an arithmetic number, because the mean of its divisors is an integer number (159345066).

Almost surely, 2^318690131 is an apocalyptic number.

318690131 is a deficient number, since it is larger than the sum of its proper divisors (1).

318690131 is an equidigital number, since it uses as much as digits as its factorization.

318690131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 318690131 is about 17851.8943252530. The cubic root of 318690131 is about 683.0558338369.

The spelling of 318690131 in words is "three hundred eighteen million, six hundred ninety thousand, one hundred thirty-one".