89926991 has 16 divisors (see below), whose sum is σ = 118713600. Its totient is φ = 65950080.

The previous prime is 89926979. The next prime is 89926997. The reversal of 89926991 is 19962998.

It is not a de Polignac number, because 89926991 - 2⁶ = 89926927 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 (89926997) 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, 33041 + ... + 35658.

It is an arithmetic number, because the mean of its divisors is an integer number (7419600).

Almost surely, 2^89926991 is an apocalyptic number.

89926991 is a deficient number, since it is larger than the sum of its proper divisors (28786609).

89926991 is a wasteful number, since it uses less digits than its factorization.

89926991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68734.

The product of its digits is 629856, while the sum is 53.

The square root of 89926991 is about 9482.9842876597. The cubic root of 89926991 is about 448.0192630296.

The spelling of 89926991 in words is "eighty-nine million, nine hundred twenty-six thousand, nine hundred ninety-one".