397713623 has 4 divisors (see below), whose sum is σ = 421108560. Its totient is φ = 374318688.

The previous prime is 397713619. The next prime is 397713637. The reversal of 397713623 is 326317793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 326317793 = 107 ⋅3049699.

It is a cyclic number.

It is not a de Polignac number, because 397713623 - 2² = 397713619 is a prime.

It is a super-2 number, since 2×397713623² = 316352251839572258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397713683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11697443 + ... + 11697476.

It is an arithmetic number, because the mean of its divisors is an integer number (105277140).

Almost surely, 2^397713623 is an apocalyptic number.

397713623 is a deficient number, since it is larger than the sum of its proper divisors (23394937).

397713623 is a wasteful number, since it uses less digits than its factorization.

397713623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23394936.

The product of its digits is 142884, while the sum is 41.

The square root of 397713623 is about 19942.7586607270. The cubic root of 397713623 is about 735.3997689503.

The spelling of 397713623 in words is "three hundred ninety-seven million, seven hundred thirteen thousand, six hundred twenty-three".