89865 has 12 divisors (see below), whose sum is σ = 155844. Its totient is φ = 47904.

The previous prime is 89849. The next prime is 89867. The reversal of 89865 is 56898.

It can be written as a sum of positive squares in 2 ways, for example, as 13689 + 76176 = 117^2 + 276^2 .

It is not a de Polignac number, because 89865 - 2⁴ = 89849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (89867) 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, 954 + ... + 1043.

It is an arithmetic number, because the mean of its divisors is an integer number (12987).

2⁸⁹⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

89865 is a deficient number, since it is larger than the sum of its proper divisors (65979).

89865 is a wasteful number, since it uses less digits than its factorization.

89865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008 (or 2005 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 89865 is about 299.7749155617. The cubic root of 89865 is about 44.7916292290.

The spelling of 89865 in words is "eighty-nine thousand, eight hundred sixty-five".