397542813 has 8 divisors (see below), whose sum is σ = 530212800. Its totient is φ = 264950688.

The previous prime is 397542809. The next prime is 397542851. The reversal of 397542813 is 318245793.

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

It is not a de Polignac number, because 397542813 - 2² = 397542809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397542883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6273 + ... + 28886.

It is an arithmetic number, because the mean of its divisors is an integer number (66276600).

Almost surely, 2^397542813 is an apocalyptic number.

It is an amenable number.

397542813 is a deficient number, since it is larger than the sum of its proper divisors (132669987).

397542813 is a wasteful number, since it uses less digits than its factorization.

397542813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38931.

The product of its digits is 181440, while the sum is 42.

The square root of 397542813 is about 19938.4756939943. The cubic root of 397542813 is about 735.2944740728.

The spelling of 397542813 in words is "three hundred ninety-seven million, five hundred forty-two thousand, eight hundred thirteen".