397213471907 has 4 divisors (see below), whose sum is σ = 453958253616. Its totient is φ = 340468690200.

The previous prime is 397213471867. The next prime is 397213471913. The reversal of 397213471907 is 709174312793.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 397213471907 - 2⁸ = 397213471651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397213471987) 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, 28372390844 + ... + 28372390857.

It is an arithmetic number, because the mean of its divisors is an integer number (113489563404).

Almost surely, 2^397213471907 is an apocalyptic number.

397213471907 is a deficient number, since it is larger than the sum of its proper divisors (56744781709).

397213471907 is an equidigital number, since it uses as much as digits as its factorization.

397213471907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56744781708.

The product of its (nonzero) digits is 2000376, while the sum is 53.

The spelling of 397213471907 in words is "three hundred ninety-seven billion, two hundred thirteen million, four hundred seventy-one thousand, nine hundred seven".