89605 has 4 divisors (see below), whose sum is σ = 107532. Its totient is φ = 71680.

The previous prime is 89603. The next prime is 89611. The reversal of 89605 is 50698.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50698 = 2 ⋅25349.

It can be written as a sum of positive squares in 2 ways, for example, as 12321 + 77284 = 111^2 + 278^2 .

It is not a de Polignac number, because 89605 - 2¹ = 89603 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 (89603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8956 + ... + 8965.

It is an arithmetic number, because the mean of its divisors is an integer number (26883).

2⁸⁹⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

89605 is a deficient number, since it is larger than the sum of its proper divisors (17927).

89605 is a wasteful number, since it uses less digits than its factorization.

89605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17926.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 89605 is about 299.3409427392. The cubic root of 89605 is about 44.7483900256.

The spelling of 89605 in words is "eighty-nine thousand, six hundred five".