397687964 has 12 divisors (see below), whose sum is σ = 718404288. Its totient is φ = 192429600.

The previous prime is 397687957. The next prime is 397687973. The reversal of 397687964 is 469786793.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1603457 + ... + 1603704.

It is an arithmetic number, because the mean of its divisors is an integer number (59867024).

Almost surely, 2^397687964 is an apocalyptic number.

It is an amenable number.

397687964 is a deficient number, since it is larger than the sum of its proper divisors (320716324).

397687964 is a wasteful number, since it uses less digits than its factorization.

397687964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3207196 (or 3207194 counting only the distinct ones).

The product of its digits is 13716864, while the sum is 59.

The square root of 397687964 is about 19942.1153341364. The cubic root of 397687964 is about 735.3839535265.

The spelling of 397687964 in words is "three hundred ninety-seven million, six hundred eighty-seven thousand, nine hundred sixty-four".