397372811 has 4 divisors (see below), whose sum is σ = 433497624. Its totient is φ = 361248000.

The previous prime is 397372793. The next prime is 397372813. The reversal of 397372811 is 118273793.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397372811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397372813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18062390 + ... + 18062411.

It is an arithmetic number, because the mean of its divisors is an integer number (108374406).

Almost surely, 2^397372811 is an apocalyptic number.

397372811 is a deficient number, since it is larger than the sum of its proper divisors (36124813).

397372811 is a wasteful number, since it uses less digits than its factorization.

397372811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36124812.

The product of its digits is 63504, while the sum is 41.

The square root of 397372811 is about 19934.2120737189. The cubic root of 397372811 is about 735.1896473308.

The spelling of 397372811 in words is "three hundred ninety-seven million, three hundred seventy-two thousand, eight hundred eleven".