89406591 has 16 divisors (see below), whose sum is σ = 121205760. Its totient is φ = 58612320.

The previous prime is 89406529. The next prime is 89406619. The reversal of 89406591 is 19560498.

It is not a de Polignac number, because 89406591 - 2¹⁷ = 89275519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89406091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73101 + ... + 74313.

It is an arithmetic number, because the mean of its divisors is an integer number (7575360).

Almost surely, 2^89406591 is an apocalyptic number.

89406591 is a deficient number, since it is larger than the sum of its proper divisors (31799169).

89406591 is a wasteful number, since it uses less digits than its factorization.

89406591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 89406591 is about 9455.5058563781. The cubic root of 89406591 is about 447.1533738909.

The spelling of 89406591 in words is "eighty-nine million, four hundred six thousand, five hundred ninety-one".