318399707 has 2 divisors, whose sum is σ = 318399708. Its totient is φ = 318399706.

The previous prime is 318399691. The next prime is 318399721. The reversal of 318399707 is 707993813.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 318399707 - 2⁴ = 318399691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (318399607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159199853 + 159199854.

It is an arithmetic number, because the mean of its divisors is an integer number (159199854).

Almost surely, 2^318399707 is an apocalyptic number.

318399707 is a deficient number, since it is larger than the sum of its proper divisors (1).

318399707 is an equidigital number, since it uses as much as digits as its factorization.

318399707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 318399707 is about 17843.7582084044. The cubic root of 318399707 is about 682.8482799792.

The spelling of 318399707 in words is "three hundred eighteen million, three hundred ninety-nine thousand, seven hundred seven".