85173 has 16 divisors (see below), whose sum is σ = 129600. Its totient is φ = 49280.

The previous prime is 85159. The next prime is 85193. The reversal of 85173 is 37158.

It is not a de Polignac number, because 85173 - 2⁶ = 85109 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 913 + ... + 1001.

It is an arithmetic number, because the mean of its divisors is an integer number (8100).

2⁸⁵¹⁷³ is an apocalyptic number.

It is an amenable number.

85173 is a deficient number, since it is larger than the sum of its proper divisors (44427).

85173 is a wasteful number, since it uses less digits than its factorization.

85173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132.

The product of its digits is 840, while the sum is 24.

The square root of 85173 is about 291.8441364838. The cubic root of 85173 is about 43.9981059791.

The spelling of 85173 in words is "eighty-five thousand, one hundred seventy-three".