91589489 has 4 divisors (see below), whose sum is σ = 96977124. Its totient is φ = 86201856.

The previous prime is 91589411. The next prime is 91589497. The reversal of 91589489 is 98498519.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98498519 = 7 ⋅14071217.

It can be written as a sum of positive squares in 2 ways, for example, as 85747600 + 5841889 = 9260^2 + 2417^2 .

It is a cyclic number.

It is not a de Polignac number, because 91589489 - 2⁸ = 91589233 is a prime.

It is a super-2 number, since 2×91589489² = 16777268990562242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91589489.

It is not an unprimeable number, because it can be changed into a prime (91589789) 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, 2693792 + ... + 2693825.

It is an arithmetic number, because the mean of its divisors is an integer number (24244281).

Almost surely, 2^91589489 is an apocalyptic number.

It is an amenable number.

91589489 is a deficient number, since it is larger than the sum of its proper divisors (5387635).

91589489 is a wasteful number, since it uses less digits than its factorization.

91589489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5387634.

The product of its digits is 933120, while the sum is 53.

The square root of 91589489 is about 9570.2397566623. The cubic root of 91589489 is about 450.7632955033.

The spelling of 91589489 in words is "ninety-one million, five hundred eighty-nine thousand, four hundred eighty-nine".