397143218579 has 4 divisors (see below), whose sum is σ = 397226674320. Its totient is φ = 397059762840.

The previous prime is 397143218567. The next prime is 397143218581. The reversal of 397143218579 is 975812341793.

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 397143218579 - 2²⁴ = 397126441363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397143298579) 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, 41720732 + ... + 41730249.

It is an arithmetic number, because the mean of its divisors is an integer number (99306668580).

Almost surely, 2^397143218579 is an apocalyptic number.

397143218579 is a deficient number, since it is larger than the sum of its proper divisors (83455741).

397143218579 is an equidigital number, since it uses as much as digits as its factorization.

397143218579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83455740.

The product of its digits is 11430720, while the sum is 59.

The spelling of 397143218579 in words is "three hundred ninety-seven billion, one hundred forty-three million, two hundred eighteen thousand, five hundred seventy-nine".