8917520089 has 4 divisors (see below), whose sum is σ = 8917830324. Its totient is φ = 8917209856.

The previous prime is 8917520071. The next prime is 8917520111. The reversal of 8917520089 is 9800257198.

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 5765820489 + 3151699600 = 75933^2 + 56140^2 .

It is a cyclic number.

It is not a de Polignac number, because 8917520089 - 2¹¹ = 8917518041 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8917524089) 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, 107032 + ... + 171145.

It is an arithmetic number, because the mean of its divisors is an integer number (2229457581).

Almost surely, 2^8917520089 is an apocalyptic number.

It is an amenable number.

8917520089 is a deficient number, since it is larger than the sum of its proper divisors (310235).

8917520089 is a wasteful number, since it uses less digits than its factorization.

8917520089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310234.

The product of its (nonzero) digits is 362880, while the sum is 49.

The square root of 8917520089 is about 94432.6219534330. The cubic root of 8917520089 is about 2073.7100485143.

The spelling of 8917520089 in words is "eight billion, nine hundred seventeen million, five hundred twenty thousand, eighty-nine".