89070979 has 2 divisors, whose sum is σ = 89070980. Its totient is φ = 89070978.

The previous prime is 89070911. The next prime is 89071009. The reversal of 89070979 is 97907098.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89070979 - 2²⁵ = 55516547 is a prime.

It is not a weakly prime, because it can be changed into another prime (89070479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44535489 + 44535490.

It is an arithmetic number, because the mean of its divisors is an integer number (44535490).

Almost surely, 2^89070979 is an apocalyptic number.

89070979 is a deficient number, since it is larger than the sum of its proper divisors (1).

89070979 is an equidigital number, since it uses as much as digits as its factorization.

89070979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768, while the sum is 49.

The square root of 89070979 is about 9437.7422617912. The cubic root of 89070979 is about 446.5931683353.

The spelling of 89070979 in words is "eighty-nine million, seventy thousand, nine hundred seventy-nine".