397545793 has 4 divisors (see below), whose sum is σ = 406791088. Its totient is φ = 388300500.

The previous prime is 397545791. The next prime is 397545817.

397545793 is nontrivially palindromic in base 10.

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 397545793 - 2¹ = 397545791 is a prime.

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 397545793.

It is not an unprimeable number, because it can be changed into a prime (397545791) 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, 4622583 + ... + 4622668.

It is an arithmetic number, because the mean of its divisors is an integer number (101697772).

Almost surely, 2^397545793 is an apocalyptic number.

It is an amenable number.

397545793 is a deficient number, since it is larger than the sum of its proper divisors (9245295).

397545793 is an equidigital number, since it uses as much as digits as its factorization.

397545793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9245294.

The product of its digits is 3572100, while the sum is 52.

The square root of 397545793 is about 19938.5504237394. The cubic root of 397545793 is about 735.2963113358.

The spelling of 397545793 in words is "three hundred ninety-seven million, five hundred forty-five thousand, seven hundred ninety-three".