396931929 has 8 divisors (see below), whose sum is σ = 560374560. Its totient is φ = 249055296.

The previous prime is 396931921. The next prime is 396931933. The reversal of 396931929 is 929139693.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 396931929 - 2³ = 396931921 is a prime.

It is a super-2 number, since 2×396931929² = 315109912519322082, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 7782979 = 396931929 / (3 + 9 + 6 + 9 + 3 + 1 + 9 + 2 + 9).

It is not an unprimeable number, because it can be changed into a prime (396931921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3891439 + ... + 3891540.

It is an arithmetic number, because the mean of its divisors is an integer number (70046820).

Almost surely, 2^396931929 is an apocalyptic number.

It is an amenable number.

396931929 is a deficient number, since it is larger than the sum of its proper divisors (163442631).

396931929 is a wasteful number, since it uses less digits than its factorization.

396931929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7782999.

The product of its digits is 708588, while the sum is 51.

The square root of 396931929 is about 19923.1505791629. The cubic root of 396931929 is about 734.9176510082.

The spelling of 396931929 in words is "three hundred ninety-six million, nine hundred thirty-one thousand, nine hundred twenty-nine".