397031457 has 4 divisors (see below), whose sum is σ = 529375280. Its totient is φ = 264687636.

The previous prime is 397031417. The next prime is 397031461. The reversal of 397031457 is 754130793.

It is a happy number.

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 not a de Polignac number, because 397031457 - 2⁷ = 397031329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397031407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66171907 + ... + 66171912.

It is an arithmetic number, because the mean of its divisors is an integer number (132343820).

Almost surely, 2^397031457 is an apocalyptic number.

It is an amenable number.

397031457 is a deficient number, since it is larger than the sum of its proper divisors (132343823).

397031457 is a wasteful number, since it uses less digits than its factorization.

397031457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132343822.

The product of its (nonzero) digits is 79380, while the sum is 39.

The square root of 397031457 is about 19925.6482203215. The cubic root of 397031457 is about 734.9790710872.

The spelling of 397031457 in words is "three hundred ninety-seven million, thirty-one thousand, four hundred fifty-seven".