397923825 has 24 divisors (see below), whose sum is σ = 708510208. Its totient is φ = 195900480.

The previous prime is 397923817. The next prime is 397923833. The reversal of 397923825 is 528329793.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (397923817) and next prime (397923833).

It is not a de Polignac number, because 397923825 - 2³ = 397923817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 203089 + ... + 205038.

Almost surely, 2^397923825 is an apocalyptic number.

It is an amenable number.

397923825 is a deficient number, since it is larger than the sum of its proper divisors (310586383).

397923825 is a wasteful number, since it uses less digits than its factorization.

397923825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408153 (or 408148 counting only the distinct ones).

The product of its digits is 816480, while the sum is 48.

The square root of 397923825 is about 19948.0280980352. The cubic root of 397923825 is about 735.5293054373.

The spelling of 397923825 in words is "three hundred ninety-seven million, nine hundred twenty-three thousand, eight hundred twenty-five".