89100021 has 8 divisors (see below), whose sum is σ = 118847584. Its totient is φ = 59376240.

The previous prime is 89100013. The next prime is 89100023. The reversal of 89100021 is 12000198.

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

It is not a de Polignac number, because 89100021 - 2³ = 89100013 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 (89100023) 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, 6555 + ... + 14871.

It is an arithmetic number, because the mean of its divisors is an integer number (14855948).

Almost surely, 2^89100021 is an apocalyptic number.

It is an amenable number.

89100021 is a deficient number, since it is larger than the sum of its proper divisors (29747563).

89100021 is a wasteful number, since it uses less digits than its factorization.

89100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11891.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 89100021 is about 9439.2807459043. The cubic root of 89100021 is about 446.6417009758.

The spelling of 89100021 in words is "eighty-nine million, one hundred thousand, twenty-one".