397777523 has 32 divisors (see below), whose sum is σ = 490635264. Its totient is φ = 317520000.

The previous prime is 397777519. The next prime is 397777537. The reversal of 397777523 is 325777793.

It is a cyclic number.

It is not a de Polignac number, because 397777523 - 2² = 397777519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397777553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 269678 + ... + 271148.

It is an arithmetic number, because the mean of its divisors is an integer number (15332352).

Almost surely, 2^397777523 is an apocalyptic number.

397777523 is a deficient number, since it is larger than the sum of its proper divisors (92857741).

397777523 is a wasteful number, since it uses less digits than its factorization.

397777523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587.

The product of its digits is 1944810, while the sum is 50.

The square root of 397777523 is about 19944.3606816564. The cubic root of 397777523 is about 735.4391520022.

The spelling of 397777523 in words is "three hundred ninety-seven million, seven hundred seventy-seven thousand, five hundred twenty-three".