89805021 has 16 divisors (see below), whose sum is σ = 122233920. Its totient is φ = 58631040.

The previous prime is 89805019. The next prime is 89805061. The reversal of 89805021 is 12050898.

It is a happy number.

It is not a de Polignac number, because 89805021 - 2¹ = 89805019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89805061) 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, 54591 + ... + 56211.

It is an arithmetic number, because the mean of its divisors is an integer number (7639620).

Almost surely, 2^89805021 is an apocalyptic number.

It is an amenable number.

89805021 is a deficient number, since it is larger than the sum of its proper divisors (32428899).

89805021 is a wasteful number, since it uses less digits than its factorization.

89805021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 89805021 is about 9476.5511131424. The cubic root of 89805021 is about 447.8166185180.

The spelling of 89805021 in words is "eighty-nine million, eight hundred five thousand, twenty-one".