396913931 has 2 divisors, whose sum is σ = 396913932. Its totient is φ = 396913930.

The previous prime is 396913903. The next prime is 396913939. The reversal of 396913931 is 139319693.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 396913931 - 2²² = 392719627 is a prime.

It is a super-2 number, since 2×396913931² = 315081337243745522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (396913939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198456965 + 198456966.

It is an arithmetic number, because the mean of its divisors is an integer number (198456966).

Almost surely, 2^396913931 is an apocalyptic number.

396913931 is a deficient number, since it is larger than the sum of its proper divisors (1).

396913931 is an equidigital number, since it uses as much as digits as its factorization.

396913931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 118098, while the sum is 44.

The square root of 396913931 is about 19922.6988884538. The cubic root of 396913931 is about 734.9065431021.

The spelling of 396913931 in words is "three hundred ninety-six million, nine hundred thirteen thousand, nine hundred thirty-one".