397865601 has 36 divisors (see below), whose sum is σ = 682099392. Its totient is φ = 227325528.

The previous prime is 397865593. The next prime is 397865621. The reversal of 397865601 is 106568793.

It is a happy number.

397865601 is a `hidden beast` number, since 3 + 9 + 7 + 86 + 560 + 1 = 666.

It is not a de Polignac number, because 397865601 - 2³ = 397865593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397865621) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 41596 + ... + 50258.

Almost surely, 2^397865601 is an apocalyptic number.

It is an amenable number.

397865601 is a deficient number, since it is larger than the sum of its proper divisors (284233791).

397865601 is an frugal number, since it uses more digits than its factorization.

397865601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8694 (or 8673 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 397865601 is about 19946.5686522770. The cubic root of 397865601 is about 735.4934296033.

The spelling of 397865601 in words is "three hundred ninety-seven million, eight hundred sixty-five thousand, six hundred one".