396913831 has 2 divisors, whose sum is σ = 396913832. Its totient is φ = 396913830.

The previous prime is 396913823. The next prime is 396913843. The reversal of 396913831 is 138319693.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 396913831 - 2³ = 396913823 is a prime.

It is a super-2 number, since 2×396913831² = 315081178478193122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396913871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198456915 + 198456916.

It is an arithmetic number, because the mean of its divisors is an integer number (198456916).

Almost surely, 2^396913831 is an apocalyptic number.

396913831 is a deficient number, since it is larger than the sum of its proper divisors (1).

396913831 is an equidigital number, since it uses as much as digits as its factorization.

396913831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 43.

The square root of 396913831 is about 19922.6963787536. The cubic root of 396913831 is about 734.9064813837.

The spelling of 396913831 in words is "three hundred ninety-six million, nine hundred thirteen thousand, eight hundred thirty-one".