397452523 has 4 divisors (see below), whose sum is σ = 428025808. Its totient is φ = 366879240.

The previous prime is 397452499. The next prime is 397452529. The reversal of 397452523 is 325254793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325254793 = 113 ⋅2878361.

It is a de Polignac number, because none of the positive numbers 2^k-397452523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397452529) 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, 15286623 + ... + 15286648.

It is an arithmetic number, because the mean of its divisors is an integer number (107006452).

Almost surely, 2^397452523 is an apocalyptic number.

397452523 is a deficient number, since it is larger than the sum of its proper divisors (30573285).

397452523 is a wasteful number, since it uses less digits than its factorization.

397452523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30573284.

The product of its digits is 226800, while the sum is 40.

The square root of 397452523 is about 19936.2113502039. The cubic root of 397452523 is about 735.2388031172.

The spelling of 397452523 in words is "three hundred ninety-seven million, four hundred fifty-two thousand, five hundred twenty-three".