397413897 has 4 divisors (see below), whose sum is σ = 529885200. Its totient is φ = 264942596.

The previous prime is 397413859. The next prime is 397413901. The reversal of 397413897 is 798314793.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 397413897 - 2⁶ = 397413833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397413197) 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, 66235647 + ... + 66235652.

It is an arithmetic number, because the mean of its divisors is an integer number (132471300).

Almost surely, 2^397413897 is an apocalyptic number.

It is an amenable number.

397413897 is a deficient number, since it is larger than the sum of its proper divisors (132471303).

397413897 is a wasteful number, since it uses less digits than its factorization.

397413897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132471302.

The product of its digits is 1143072, while the sum is 51.

The square root of 397413897 is about 19935.2425869363. The cubic root of 397413897 is about 735.2149845457.

It can be divided in two parts, 3974 and 13897, that added together give a palindrome (17871).

The spelling of 397413897 in words is "three hundred ninety-seven million, four hundred thirteen thousand, eight hundred ninety-seven".