89188065 has 24 divisors (see below), whose sum is σ = 156461760. Its totient is φ = 46991904.

The previous prime is 89188049. The next prime is 89188067. The reversal of 89188065 is 56088198.

It is not a de Polignac number, because 89188065 - 2⁴ = 89188049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 89188065.

It is not an unprimeable number, because it can be changed into a prime (89188067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8205 + ... + 15674.

It is an arithmetic number, because the mean of its divisors is an integer number (6519240).

Almost surely, 2^89188065 is an apocalyptic number.

It is an amenable number.

89188065 is a deficient number, since it is larger than the sum of its proper divisors (67273695).

89188065 is a wasteful number, since it uses less digits than its factorization.

89188065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23973 (or 23970 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 89188065 is about 9443.9432971614. The cubic root of 89188065 is about 446.7887685669.

The spelling of 89188065 in words is "eighty-nine million, one hundred eighty-eight thousand, sixty-five".