84595578979 has 2 divisors, whose sum is σ = 84595578980. Its totient is φ = 84595578978.

The previous prime is 84595578971. The next prime is 84595579063. The reversal of 84595578979 is 97987559548.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84595578979 - 2³ = 84595578971 is a prime.

It is not a weakly prime, because it can be changed into another prime (84595578971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42297789489 + 42297789490.

It is an arithmetic number, because the mean of its divisors is an integer number (42297789490).

Almost surely, 2^84595578979 is an apocalyptic number.

84595578979 is a deficient number, since it is larger than the sum of its proper divisors (1).

84595578979 is an equidigital number, since it uses as much as digits as its factorization.

84595578979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1143072000, while the sum is 76.

The spelling of 84595578979 in words is "eighty-four billion, five hundred ninety-five million, five hundred seventy-eight thousand, nine hundred seventy-nine".