86173 has 8 divisors (see below), whose sum is σ = 94392. Its totient is φ = 78336.

The previous prime is 86171. The next prime is 86179. The reversal of 86173 is 37168.

It can be written as a sum of positive squares in 4 ways, for example, as 45369 + 40804 = 213^2 + 202^2 .

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

It is not a de Polignac number, because 86173 - 2¹ = 86171 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 (86171) 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, 561 + ... + 697.

It is an arithmetic number, because the mean of its divisors is an integer number (11799).

2⁸⁶¹⁷³ is an apocalyptic number.

It is an amenable number.

86173 is a deficient number, since it is larger than the sum of its proper divisors (8219).

86173 is a wasteful number, since it uses less digits than its factorization.

86173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191.

The product of its digits is 1008, while the sum is 25.

The square root of 86173 is about 293.5523803344. The cubic root of 86173 is about 44.1696275852.

It can be divided in two parts, 86 and 173, that multiplied together give a triangular number (14878 = T₁₇₂).

The spelling of 86173 in words is "eighty-six thousand, one hundred seventy-three".