397423505427 has 32 divisors (see below), whose sum is σ = 575189852160. Its totient is φ = 242627823360.

The previous prime is 397423505411. The next prime is 397423505447. The reversal of 397423505427 is 724505324793.

It is not a de Polignac number, because 397423505427 - 2⁴ = 397423505411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 397423505427.

It is not an unprimeable number, because it can be changed into a prime (397423505447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20257599 + ... + 20277207.

It is an arithmetic number, because the mean of its divisors is an integer number (17974682880).

Almost surely, 2^397423505427 is an apocalyptic number.

397423505427 is a deficient number, since it is larger than the sum of its proper divisors (177766346733).

397423505427 is a wasteful number, since it uses less digits than its factorization.

397423505427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23723.

The product of its (nonzero) digits is 6350400, while the sum is 51.

The spelling of 397423505427 in words is "three hundred ninety-seven billion, four hundred twenty-three million, five hundred five thousand, four hundred twenty-seven".