89044979 has 2 divisors, whose sum is σ = 89044980. Its totient is φ = 89044978.

The previous prime is 89044961. The next prime is 89044981. The reversal of 89044979 is 97944098.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89044979 is a prime.

It is a super-2 number, since 2×89044979² = 15858016570220882, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 89044981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (89044939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44522489 + 44522490.

It is an arithmetic number, because the mean of its divisors is an integer number (44522490).

Almost surely, 2^89044979 is an apocalyptic number.

89044979 is a deficient number, since it is larger than the sum of its proper divisors (1).

89044979 is an equidigital number, since it uses as much as digits as its factorization.

89044979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 89044979 is about 9436.3647131721. The cubic root of 89044979 is about 446.5497102884.

The spelling of 89044979 in words is "eighty-nine million, forty-four thousand, nine hundred seventy-nine".