89288581 has 4 divisors (see below), whose sum is σ = 93988000. Its totient is φ = 84589164.

The previous prime is 89288561. The next prime is 89288609. The reversal of 89288581 is 18588298.

It is a happy number.

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 89288581 - 2¹⁵ = 89255813 is a prime.

It is a super-2 number, since 2×89288581² = 15944901393987122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89288501) 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, 2349681 + ... + 2349718.

It is an arithmetic number, because the mean of its divisors is an integer number (23497000).

Almost surely, 2^89288581 is an apocalyptic number.

It is an amenable number.

89288581 is a deficient number, since it is larger than the sum of its proper divisors (4699419).

89288581 is a wasteful number, since it uses less digits than its factorization.

89288581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4699418.

The product of its digits is 368640, while the sum is 49.

The square root of 89288581 is about 9449.2635162747. The cubic root of 89288581 is about 446.9565509537.

The spelling of 89288581 in words is "eighty-nine million, two hundred eighty-eight thousand, five hundred eighty-one".