89951565 has 16 divisors (see below), whose sum is σ = 157006656. Its totient is φ = 43612800.

The previous prime is 89951527. The next prime is 89951569. The reversal of 89951565 is 56515998.

It is a happy number.

It is not a de Polignac number, because 89951565 - 2⁶ = 89951501 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 (89951569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272416 + ... + 272745.

It is an arithmetic number, because the mean of its divisors is an integer number (9812916).

Almost surely, 2^89951565 is an apocalyptic number.

It is an amenable number.

89951565 is a deficient number, since it is larger than the sum of its proper divisors (67055091).

89951565 is a wasteful number, since it uses less digits than its factorization.

89951565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545180.

The product of its digits is 486000, while the sum is 48.

The square root of 89951565 is about 9484.2798883205. The cubic root of 89951565 is about 448.0600688083.

It can be divided in two parts, 8995156 and 5, that added together give a triangular number (8995161 = T₄₂₄₁).

The spelling of 89951565 in words is "eighty-nine million, nine hundred fifty-one thousand, five hundred sixty-five".