89818817 has 4 divisors (see below), whose sum is σ = 97984176. Its totient is φ = 81653460.

The previous prime is 89818789. The next prime is 89818819. The reversal of 89818817 is 71881898.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 89818817 - 2¹⁸ = 89556673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89818819) 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, 4082663 + ... + 4082684.

It is an arithmetic number, because the mean of its divisors is an integer number (24496044).

Almost surely, 2^89818817 is an apocalyptic number.

It is an amenable number.

89818817 is a deficient number, since it is larger than the sum of its proper divisors (8165359).

89818817 is a wasteful number, since it uses less digits than its factorization.

89818817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8165358.

The product of its digits is 258048, while the sum is 50.

The square root of 89818817 is about 9477.2789871355. The cubic root of 89818817 is about 447.8395487939.

The spelling of 89818817 in words is "eighty-nine million, eight hundred eighteen thousand, eight hundred seventeen".