397367931 has 8 divisors (see below), whose sum is σ = 530110224. Its totient is φ = 264768800.

The previous prime is 397367917. The next prime is 397367953. The reversal of 397367931 is 139763793.

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

It is a cyclic number.

It is not a de Polignac number, because 397367931 - 2¹⁷ = 397236859 is a prime.

It is a super-2 number, since 2×397367931² = 315802545174441522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (397367731) 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, 29136 + ... + 40541.

It is an arithmetic number, because the mean of its divisors is an integer number (66263778).

Almost surely, 2^397367931 is an apocalyptic number.

397367931 is a deficient number, since it is larger than the sum of its proper divisors (132742293).

397367931 is a wasteful number, since it uses less digits than its factorization.

397367931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71581.

The product of its digits is 642978, while the sum is 48.

The square root of 397367931 is about 19934.0896707123. The cubic root of 397367931 is about 735.1866377807.

The spelling of 397367931 in words is "three hundred ninety-seven million, three hundred sixty-seven thousand, nine hundred thirty-one".