89409021 has 16 divisors (see below), whose sum is σ = 130302144. Its totient is φ = 54198144.

The previous prime is 89409007. The next prime is 89409029. The reversal of 89409021 is 12090498.

It is not a de Polignac number, because 89409021 - 2⁵ = 89408989 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89409029) 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, 14496 + ... + 19721.

It is an arithmetic number, because the mean of its divisors is an integer number (8143884).

Almost surely, 2^89409021 is an apocalyptic number.

It is an amenable number.

89409021 is a deficient number, since it is larger than the sum of its proper divisors (40893123).

89409021 is a wasteful number, since it uses less digits than its factorization.

89409021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34300.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 89409021 is about 9455.6343520676. The cubic root of 89409021 is about 447.1574249452.

The spelling of 89409021 in words is "eighty-nine million, four hundred nine thousand, twenty-one".