397814931 has 6 divisors (see below), whose sum is σ = 574621580. Its totient is φ = 265209948.

The previous prime is 397814929. The next prime is 397814939. The reversal of 397814931 is 139418793.

It is not a de Polignac number, because 397814931 - 2¹ = 397814929 is a prime.

It is a super-2 number, since 2×397814931² = 316513438653069522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397814939) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22100821 + ... + 22100838.

Almost surely, 2^397814931 is an apocalyptic number.

397814931 is a deficient number, since it is larger than the sum of its proper divisors (176806649).

397814931 is a wasteful number, since it uses less digits than its factorization.

397814931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44201665 (or 44201662 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 397814931 is about 19945.2984685615. The cubic root of 397814931 is about 735.4622054629.

The spelling of 397814931 in words is "three hundred ninety-seven million, eight hundred fourteen thousand, nine hundred thirty-one".