89479021 has 4 divisors (see below), whose sum is σ = 89498044. Its totient is φ = 89460000.

The previous prime is 89478959. The next prime is 89479043. The reversal of 89479021 is 12097498.

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 34644996 + 54834025 = 5886^2 + 7405^2 .

It is a cyclic number.

It is not a de Polignac number, because 89479021 - 2²³ = 81090413 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 (89479121) 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, 3271 + ... + 13771.

It is an arithmetic number, because the mean of its divisors is an integer number (22374511).

Almost surely, 2^89479021 is an apocalyptic number.

It is an amenable number.

89479021 is a deficient number, since it is larger than the sum of its proper divisors (19023).

89479021 is a wasteful number, since it uses less digits than its factorization.

89479021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19022.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 89479021 is about 9459.3351246269. The cubic root of 89479021 is about 447.2740904831.

The spelling of 89479021 in words is "eighty-nine million, four hundred seventy-nine thousand, twenty-one".