397452731 has 8 divisors (see below), whose sum is σ = 428193360. Its totient is φ = 366736032.

The previous prime is 397452709. The next prime is 397452749. The reversal of 397452731 is 137254793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 397452731 - 2⁶ = 397452667 is a prime.

It is a super-2 number, since 2×397452731² = 315937346758716722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397452931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44096 + ... + 52338.

It is an arithmetic number, because the mean of its divisors is an integer number (53524170).

Almost surely, 2^397452731 is an apocalyptic number.

397452731 is a deficient number, since it is larger than the sum of its proper divisors (30740629).

397452731 is a wasteful number, since it uses less digits than its factorization.

397452731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11965.

The product of its digits is 158760, while the sum is 41.

The square root of 397452731 is about 19936.2165668414. The cubic root of 397452731 is about 735.2389313754.

The spelling of 397452731 in words is "three hundred ninety-seven million, four hundred fifty-two thousand, seven hundred thirty-one".