89520979 has 2 divisors, whose sum is σ = 89520980. Its totient is φ = 89520978.

The previous prime is 89520961. The next prime is 89521001. The reversal of 89520979 is 97902598.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89520979 is a prime.

It is a super-2 number, since 2×89520979² = 16028011362236882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (89520919) 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 as a sum of consecutive naturals, namely, 44760489 + 44760490.

It is an arithmetic number, because the mean of its divisors is an integer number (44760490).

Almost surely, 2^89520979 is an apocalyptic number.

89520979 is a deficient number, since it is larger than the sum of its proper divisors (1).

89520979 is an equidigital number, since it uses as much as digits as its factorization.

89520979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 89520979 is about 9461.5526738480. The cubic root of 89520979 is about 447.3439906433.

The spelling of 89520979 in words is "eighty-nine million, five hundred twenty thousand, nine hundred seventy-nine".