85169189 has 16 divisors (see below), whose sum is σ = 99141120. Its totient is φ = 71660160.

The previous prime is 85169179. The next prime is 85169213. The reversal of 85169189 is 98196158.

It is a cyclic number.

It is not a de Polignac number, because 85169189 - 2²⁰ = 84120613 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85169129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128519 + ... + 129179.

It is an arithmetic number, because the mean of its divisors is an integer number (6196320).

Almost surely, 2^85169189 is an apocalyptic number.

It is an amenable number.

85169189 is a deficient number, since it is larger than the sum of its proper divisors (13971931).

85169189 is a wasteful number, since it uses less digits than its factorization.

85169189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980.

The product of its digits is 155520, while the sum is 47.

The square root of 85169189 is about 9228.7154577438. The cubic root of 85169189 is about 439.9744974888.

It can be divided in two parts, 85169 and 189, that added together give a palindrome (85358).

The spelling of 85169189 in words is "eighty-five million, one hundred sixty-nine thousand, one hundred eighty-nine".