864475971979 has 2 divisors, whose sum is σ = 864475971980. Its totient is φ = 864475971978.

The previous prime is 864475971941. The next prime is 864475972007. The reversal of 864475971979 is 979179574468.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 864475971979 - 2⁹ = 864475971467 is a prime.

It is a super-2 number, since 2×864475971979² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (864475971379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432237985989 + 432237985990.

It is an arithmetic number, because the mean of its divisors is an integer number (432237985990).

Almost surely, 2^864475971979 is an apocalyptic number.

864475971979 is a deficient number, since it is larger than the sum of its proper divisors (1).

864475971979 is an equidigital number, since it uses as much as digits as its factorization.

864475971979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960180480, while the sum is 76.

The spelling of 864475971979 in words is "eight hundred sixty-four billion, four hundred seventy-five million, nine hundred seventy-one thousand, nine hundred seventy-nine".