397709575 has 6 divisors (see below), whose sum is σ = 493159904. Its totient is φ = 318167640.

The previous prime is 397709563. The next prime is 397709579. The reversal of 397709575 is 575907793.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-397709575 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397709579) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7954167 + ... + 7954216.

Almost surely, 2^397709575 is an apocalyptic number.

397709575 is a deficient number, since it is larger than the sum of its proper divisors (95450329).

397709575 is a wasteful number, since it uses less digits than its factorization.

397709575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15908393 (or 15908388 counting only the distinct ones).

The product of its (nonzero) digits is 2083725, while the sum is 52.

The square root of 397709575 is about 19942.6571699962. The cubic root of 397709575 is about 735.3972739320.

The spelling of 397709575 in words is "three hundred ninety-seven million, seven hundred nine thousand, five hundred seventy-five".