89418565 has 8 divisors (see below), whose sum is σ = 107986680. Its totient is φ = 71078592.

The previous prime is 89418547. The next prime is 89418587. The reversal of 89418565 is 56581498.

89418565 = 6686² + 6687².

It can be written as a sum of positive squares in 4 ways, for example, as 1790244 + 87628321 = 1338^2 + 9361^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 89418565 - 2⁷ = 89418437 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 56170 + ... + 57739.

It is an arithmetic number, because the mean of its divisors is an integer number (13498335).

Almost surely, 2^89418565 is an apocalyptic number.

89418565 is the 6687-th centered square number.

It is an amenable number.

89418565 is a deficient number, since it is larger than the sum of its proper divisors (18568115).

89418565 is a wasteful number, since it uses less digits than its factorization.

89418565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114071.

The product of its digits is 345600, while the sum is 46.

The square root of 89418565 is about 9456.1390112456. The cubic root of 89418565 is about 447.1733350423.

The spelling of 89418565 in words is "eighty-nine million, four hundred eighteen thousand, five hundred sixty-five".