397337138 has 12 divisors (see below), whose sum is σ = 655114110. Its totient is φ = 180607680.

The previous prime is 397337111. The next prime is 397337147. The reversal of 397337138 is 831733793.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 269714929 + 127622209 = 16423^2 + 11297^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 820703 + ... + 821186.

Almost surely, 2^397337138 is an apocalyptic number.

397337138 is a deficient number, since it is larger than the sum of its proper divisors (257776972).

397337138 is a wasteful number, since it uses less digits than its factorization.

397337138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641913 (or 1641902 counting only the distinct ones).

The product of its digits is 285768, while the sum is 44.

The square root of 397337138 is about 19933.3172853893. The cubic root of 397337138 is about 735.1676468279.

The spelling of 397337138 in words is "three hundred ninety-seven million, three hundred thirty-seven thousand, one hundred thirty-eight".