89216591 has 2 divisors, whose sum is σ = 89216592. Its totient is φ = 89216590.

The previous prime is 89216579. The next prime is 89216639. The reversal of 89216591 is 19561298.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89216591 is a prime.

It is a super-2 number, since 2×89216591² = 15919200219322562, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89216521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44608295 + 44608296.

It is an arithmetic number, because the mean of its divisors is an integer number (44608296).

Almost surely, 2^89216591 is an apocalyptic number.

89216591 is a deficient number, since it is larger than the sum of its proper divisors (1).

89216591 is an equidigital number, since it uses as much as digits as its factorization.

89216591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 41.

The square root of 89216591 is about 9445.4534565578. The cubic root of 89216591 is about 446.8363972784.

The spelling of 89216591 in words is "eighty-nine million, two hundred sixteen thousand, five hundred ninety-one".