397643403913 has 4 divisors (see below), whose sum is σ = 454449604480. Its totient is φ = 340837203348.

The previous prime is 397643403901. The next prime is 397643403917. The reversal of 397643403913 is 319304346793.

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 397643403913 - 2²¹ = 397641306761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397643403917) 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, 28403100273 + ... + 28403100286.

It is an arithmetic number, because the mean of its divisors is an integer number (113612401120).

Almost surely, 2^397643403913 is an apocalyptic number.

It is an amenable number.

397643403913 is a deficient number, since it is larger than the sum of its proper divisors (56806200567).

397643403913 is an equidigital number, since it uses as much as digits as its factorization.

397643403913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56806200566.

The product of its (nonzero) digits is 4408992, while the sum is 52.

The spelling of 397643403913 in words is "three hundred ninety-seven billion, six hundred forty-three million, four hundred three thousand, nine hundred thirteen".