89698591 has 2 divisors, whose sum is σ = 89698592. Its totient is φ = 89698590.

The previous prime is 89698573. The next prime is 89698603. The reversal of 89698591 is 19589698.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89698591 - 2⁹ = 89698079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89698571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44849295 + 44849296.

It is an arithmetic number, because the mean of its divisors is an integer number (44849296).

Almost surely, 2^89698591 is an apocalyptic number.

89698591 is a deficient number, since it is larger than the sum of its proper divisors (1).

89698591 is an equidigital number, since it uses as much as digits as its factorization.

89698591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 55.

The square root of 89698591 is about 9470.9340088504. The cubic root of 89698591 is about 447.6396426552.

The spelling of 89698591 in words is "eighty-nine million, six hundred ninety-eight thousand, five hundred ninety-one".