397654931 has 4 divisors (see below), whose sum is σ = 411367200. Its totient is φ = 383942664.

The previous prime is 397654891. The next prime is 397654987. The reversal of 397654931 is 139456793.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 397654931 - 2²⁶ = 330546067 is a prime.

It is a super-2 number, since 2×397654931² = 316258888297229522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397654331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6856091 + ... + 6856148.

It is an arithmetic number, because the mean of its divisors is an integer number (102841800).

Almost surely, 2^397654931 is an apocalyptic number.

397654931 is a deficient number, since it is larger than the sum of its proper divisors (13712269).

397654931 is a wasteful number, since it uses less digits than its factorization.

397654931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13712268.

The product of its digits is 612360, while the sum is 47.

The square root of 397654931 is about 19941.2870948693. The cubic root of 397654931 is about 735.3635919927.

The spelling of 397654931 in words is "three hundred ninety-seven million, six hundred fifty-four thousand, nine hundred thirty-one".