312603931 has 2 divisors, whose sum is σ = 312603932. Its totient is φ = 312603930.

The previous prime is 312603923. The next prime is 312603943. The reversal of 312603931 is 139306213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312603931 - 2³ = 312603923 is a prime.

It is a super-2 number, since 2×312603931² = 195442435353305522, 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 312603931.

It is not a weakly prime, because it can be changed into another prime (312603331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156301965 + 156301966.

It is an arithmetic number, because the mean of its divisors is an integer number (156301966).

Almost surely, 2^312603931 is an apocalyptic number.

312603931 is a deficient number, since it is larger than the sum of its proper divisors (1).

312603931 is an equidigital number, since it uses as much as digits as its factorization.

312603931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 312603931 is about 17680.6088978858. The cubic root of 312603931 is about 678.6796257136.

The spelling of 312603931 in words is "three hundred twelve million, six hundred three thousand, nine hundred thirty-one".