397914433 has 4 divisors (see below), whose sum is σ = 454759360. Its totient is φ = 341069508.

The previous prime is 397914431. The next prime is 397914437. The reversal of 397914433 is 334419793.

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 397914433 - 2¹ = 397914431 is a prime.

It is a super-2 number, since 2×397914433² = 316671791979422978, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 397914433.

It is not an unprimeable number, because it can be changed into a prime (397914431) 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, 28422453 + ... + 28422466.

It is an arithmetic number, because the mean of its divisors is an integer number (113689840).

Almost surely, 2^397914433 is an apocalyptic number.

It is an amenable number.

397914433 is a deficient number, since it is larger than the sum of its proper divisors (56844927).

397914433 is an equidigital number, since it uses as much as digits as its factorization.

397914433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56844926.

The product of its digits is 244944, while the sum is 43.

The square root of 397914433 is about 19947.7926849063. The cubic root of 397914433 is about 735.5235186131.

The spelling of 397914433 in words is "three hundred ninety-seven million, nine hundred fourteen thousand, four hundred thirty-three".