397198311 has 16 divisors (see below), whose sum is σ = 540766464. Its totient is φ = 259262784.

The previous prime is 397198303. The next prime is 397198327. The reversal of 397198311 is 113891793.

It is not a de Polignac number, because 397198311 - 2³ = 397198303 is a prime.

It is a super-2 number, since 2×397198311² = 315532996522505442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397198301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27651 + ... + 39483.

It is an arithmetic number, because the mean of its divisors is an integer number (33797904).

Almost surely, 2^397198311 is an apocalyptic number.

397198311 is a deficient number, since it is larger than the sum of its proper divisors (143568153).

397198311 is a wasteful number, since it uses less digits than its factorization.

397198311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12070.

The product of its digits is 40824, while the sum is 42.

The square root of 397198311 is about 19929.8346957520. The cubic root of 397198311 is about 735.0820159299.

The spelling of 397198311 in words is "three hundred ninety-seven million, one hundred ninety-eight thousand, three hundred eleven".