89867565 has 12 divisors (see below), whose sum is σ = 155770524. Its totient is φ = 47929344.

The previous prime is 89867537. The next prime is 89867567. The reversal of 89867565 is 56576898.

It can be written as a sum of positive squares in 2 ways, for example, as 29354724 + 60512841 = 5418^2 + 7779^2 .

It is not a de Polignac number, because 89867565 - 2⁶ = 89867501 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89867567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 998484 + ... + 998573.

It is an arithmetic number, because the mean of its divisors is an integer number (12980877).

Almost surely, 2^89867565 is an apocalyptic number.

It is an amenable number.

89867565 is a deficient number, since it is larger than the sum of its proper divisors (65902959).

89867565 is a wasteful number, since it uses less digits than its factorization.

89867565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997068 (or 1997065 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The square root of 89867565 is about 9479.8504735043. The cubic root of 89867565 is about 447.9205538464.

The spelling of 89867565 in words is "eighty-nine million, eight hundred sixty-seven thousand, five hundred sixty-five".