89216579 has 2 divisors, whose sum is σ = 89216580. Its totient is φ = 89216578.

The previous prime is 89216539. The next prime is 89216591. The reversal of 89216579 is 97561298.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89216579 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (89216539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44608289 + 44608290.

It is an arithmetic number, because the mean of its divisors is an integer number (44608290).

Almost surely, 2^89216579 is an apocalyptic number.

89216579 is a deficient number, since it is larger than the sum of its proper divisors (1).

89216579 is an equidigital number, since it uses as much as digits as its factorization.

89216579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 47.

The square root of 89216579 is about 9445.4528213315. The cubic root of 89216579 is about 446.8363772446.

It can be divided in two parts, 892 and 16579, that added together give a palindrome (17471).

The spelling of 89216579 in words is "eighty-nine million, two hundred sixteen thousand, five hundred seventy-nine".