89089991 has 8 divisors (see below), whose sum is σ = 90435744. Its totient is φ = 87754240.

The previous prime is 89089981. The next prime is 89090011. The reversal of 89089991 is 19998098.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 89089991 - 2⁶ = 89089927 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 (89089961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16511 + ... + 21231.

It is an arithmetic number, because the mean of its divisors is an integer number (11304468).

Almost surely, 2^89089991 is an apocalyptic number.

89089991 is a deficient number, since it is larger than the sum of its proper divisors (1345753).

89089991 is a wasteful number, since it uses less digits than its factorization.

89089991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5001.

The product of its (nonzero) digits is 419904, while the sum is 53.

The square root of 89089991 is about 9438.7494404714. The cubic root of 89089991 is about 446.6249408437.

The spelling of 89089991 in words is "eighty-nine million, eighty-nine thousand, nine hundred ninety-one".