89668979 has 2 divisors, whose sum is σ = 89668980. Its totient is φ = 89668978.

The previous prime is 89668939. The next prime is 89668991. The reversal of 89668979 is 97986698.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89668979 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (89668939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44834489 + 44834490.

It is an arithmetic number, because the mean of its divisors is an integer number (44834490).

Almost surely, 2^89668979 is an apocalyptic number.

89668979 is a deficient number, since it is larger than the sum of its proper divisors (1).

89668979 is an equidigital number, since it uses as much as digits as its factorization.

89668979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11757312, while the sum is 62.

The square root of 89668979 is about 9469.3705704234. The cubic root of 89668979 is about 447.5903778010.

The spelling of 89668979 in words is "eighty-nine million, six hundred sixty-eight thousand, nine hundred seventy-nine".