397973164 has 36 divisors (see below), whose sum is σ = 757659000. Its totient is φ = 182399040.

The previous prime is 397973161. The next prime is 397973171. The reversal of 397973164 is 461379793.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (397973161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70312 + ... + 75760.

Almost surely, 2^397973164 is an apocalyptic number.

It is an amenable number.

397973164 is a deficient number, since it is larger than the sum of its proper divisors (359685836).

397973164 is a wasteful number, since it uses less digits than its factorization.

397973164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5534 (or 5501 counting only the distinct ones).

The product of its digits is 857304, while the sum is 49.

The square root of 397973164 is about 19949.2647483560. The cubic root of 397973164 is about 735.5597038689.

The spelling of 397973164 in words is "three hundred ninety-seven million, nine hundred seventy-three thousand, one hundred sixty-four".