89216639 has 2 divisors, whose sum is σ = 89216640. Its totient is φ = 89216638.

The previous prime is 89216591. The next prime is 89216641. The reversal of 89216639 is 93661298.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89216639 - 2²⁰ = 88168063 is a prime.

Together with 89216641, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89216639.

It is a congruent number.

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, 44608319 + 44608320.

It is an arithmetic number, because the mean of its divisors is an integer number (44608320).

Almost surely, 2^89216639 is an apocalyptic number.

89216639 is a deficient number, since it is larger than the sum of its proper divisors (1).

89216639 is an equidigital number, since it uses as much as digits as its factorization.

89216639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 44.

The square root of 89216639 is about 9445.4559974625. The cubic root of 89216639 is about 446.8364774135.

The spelling of 89216639 in words is "eighty-nine million, two hundred sixteen thousand, six hundred thirty-nine".