89156621 has 4 divisors (see below), whose sum is σ = 89213244. Its totient is φ = 89100000.

The previous prime is 89156609. The next prime is 89156633. The reversal of 89156621 is 12665198.

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

It is an interprime number because it is at equal distance from previous prime (89156609) and next prime (89156633).

It can be written as a sum of positive squares in 2 ways, for example, as 28238596 + 60918025 = 5314^2 + 7805^2 .

It is a cyclic number.

It is not a de Polignac number, because 89156621 - 2¹⁴ = 89140237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89156681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25880 + ... + 29121.

It is an arithmetic number, because the mean of its divisors is an integer number (22303311).

Almost surely, 2^89156621 is an apocalyptic number.

It is an amenable number.

89156621 is a deficient number, since it is larger than the sum of its proper divisors (56623).

89156621 is a wasteful number, since it uses less digits than its factorization.

89156621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56622.

The product of its digits is 25920, while the sum is 38.

The square root of 89156621 is about 9442.2783797132. The cubic root of 89156621 is about 446.7362560198.

The spelling of 89156621 in words is "eighty-nine million, one hundred fifty-six thousand, six hundred twenty-one".