89994521 has 4 divisors (see below), whose sum is σ = 90021732. Its totient is φ = 89967312.

The previous prime is 89994497. The next prime is 89994523. The reversal of 89994521 is 12549998.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 83466496 + 6528025 = 9136^2 + 2555^2 .

It is a cyclic number.

It is not a de Polignac number, because 89994521 - 2¹⁴ = 89978137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89994523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7826 + ... + 15531.

It is an arithmetic number, because the mean of its divisors is an integer number (22505433).

Almost surely, 2^89994521 is an apocalyptic number.

It is an amenable number.

89994521 is a deficient number, since it is larger than the sum of its proper divisors (27211).

89994521 is a wasteful number, since it uses less digits than its factorization.

89994521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27210.

The product of its digits is 233280, while the sum is 47.

The square root of 89994521 is about 9486.5442074551. The cubic root of 89994521 is about 448.1313805391.

The spelling of 89994521 in words is "eighty-nine million, nine hundred ninety-four thousand, five hundred twenty-one".