85189 has 4 divisors (see below), whose sum is σ = 91756. Its totient is φ = 78624.

The previous prime is 85159. The next prime is 85193. The reversal of 85189 is 98158.

85189 is nontrivially palindromic in base 4.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20164 + 65025 = 142^2 + 255^2 .

It is not a de Polignac number, because 85189 - 2⁷ = 85061 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85109) 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, 3264 + ... + 3289.

It is an arithmetic number, because the mean of its divisors is an integer number (22939).

2⁸⁵¹⁸⁹ is an apocalyptic number.

It is an amenable number.

85189 is a deficient number, since it is larger than the sum of its proper divisors (6567).

85189 is a wasteful number, since it uses less digits than its factorization.

85189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6566.

The product of its digits is 2880, while the sum is 31.

The square root of 85189 is about 291.8715470888. The cubic root of 85189 is about 44.0008608647. Note that the first 3 decimals are identical.

Subtracting from 85189 its sum of digits (31), we obtain a palindrome (85158).

The spelling of 85189 in words is "eighty-five thousand, one hundred eighty-nine".