89988979 has 6 divisors (see below), whose sum is σ = 91148820. Its totient is φ = 88843716.

The previous prime is 89988971. The next prime is 89989051. The reversal of 89988979 is 97988998.

It is a happy number.

It is not a de Polignac number, because 89988979 - 2³ = 89988971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89988971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 969 + ... + 13450.

It is an arithmetic number, because the mean of its divisors is an integer number (15191470).

Almost surely, 2^89988979 is an apocalyptic number.

89988979 is a deficient number, since it is larger than the sum of its proper divisors (1159841).

89988979 is an equidigital number, since it uses as much as digits as its factorization.

89988979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14577 (or 14498 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 67.

The square root of 89988979 is about 9486.2521050202. The cubic root of 89988979 is about 448.1221814787.

The spelling of 89988979 in words is "eighty-nine million, nine hundred eighty-eight thousand, nine hundred seventy-nine".