89870621 has 4 divisors (see below), whose sum is σ = 89960700. Its totient is φ = 89780544.

The previous prime is 89870617. The next prime is 89870633. The reversal of 89870621 is 12607898.

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 20748025 + 69122596 = 4555^2 + 8314^2 .

It is a cyclic number.

It is not a de Polignac number, because 89870621 - 2² = 89870617 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 (89870611) 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, 43526 + ... + 45543.

It is an arithmetic number, because the mean of its divisors is an integer number (22490175).

Almost surely, 2^89870621 is an apocalyptic number.

It is an amenable number.

89870621 is a deficient number, since it is larger than the sum of its proper divisors (90079).

89870621 is a wasteful number, since it uses less digits than its factorization.

89870621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90078.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 89870621 is about 9480.0116561110. The cubic root of 89870621 is about 447.9256310572.

The spelling of 89870621 in words is "eighty-nine million, eight hundred seventy thousand, six hundred twenty-one".