89716579 has 2 divisors, whose sum is σ = 89716580. Its totient is φ = 89716578.

The previous prime is 89716559. The next prime is 89716591. The reversal of 89716579 is 97561798.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89716579 is a prime.

It is not a weakly prime, because it can be changed into another prime (89716519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44858289 + 44858290.

It is an arithmetic number, because the mean of its divisors is an integer number (44858290).

Almost surely, 2^89716579 is an apocalyptic number.

89716579 is a deficient number, since it is larger than the sum of its proper divisors (1).

89716579 is an equidigital number, since it uses as much as digits as its factorization.

89716579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 52.

The square root of 89716579 is about 9471.8836035923. The cubic root of 89716579 is about 447.6695636146.

The spelling of 89716579 in words is "eighty-nine million, seven hundred sixteen thousand, five hundred seventy-nine".