89765 has 8 divisors (see below), whose sum is σ = 116088. Its totient is φ = 66240.

The previous prime is 89759. The next prime is 89767. The reversal of 89765 is 56798.

It can be written as a sum of positive squares in 4 ways, for example, as 961 + 88804 = 31^2 + 298^2 .

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

It is not a de Polignac number, because 89765 - 2¹⁰ = 88741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 626 + ... + 755.

It is an arithmetic number, because the mean of its divisors is an integer number (14511).

2⁸⁹⁷⁶⁵ is an apocalyptic number.

It is an amenable number.

89765 is a deficient number, since it is larger than the sum of its proper divisors (26323).

89765 is a wasteful number, since it uses less digits than its factorization.

89765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399.

The product of its digits is 15120, while the sum is 35.

The square root of 89765 is about 299.6080773277. The cubic root of 89765 is about 44.7750086485.

The spelling of 89765 in words is "eighty-nine thousand, seven hundred sixty-five".