91589 has 4 divisors (see below), whose sum is σ = 93024. Its totient is φ = 90156.

The previous prime is 91583. The next prime is 91591. The reversal of 91589 is 98519.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91589 - 2⁴ = 91573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 617 + ... + 750.

It is an arithmetic number, because the mean of its divisors is an integer number (23256).

2⁹¹⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

91589 is a deficient number, since it is larger than the sum of its proper divisors (1435).

91589 is a wasteful number, since it uses less digits than its factorization.

91589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434.

The product of its digits is 3240, while the sum is 32.

The square root of 91589 is about 302.6367459513. The cubic root of 91589 is about 45.0762493287.

The spelling of 91589 in words is "ninety-one thousand, five hundred eighty-nine".