85685 has 4 divisors (see below), whose sum is σ = 102828. Its totient is φ = 68544.

The previous prime is 85669. The next prime is 85691. The reversal of 85685 is 58658.

85685 = 168² + 169² + 170².

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 10609 + 75076 = 103^2 + 274^2 .

It is a cyclic number.

It is not a de Polignac number, because 85685 - 2⁴ = 85669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8564 + ... + 8573.

It is an arithmetic number, because the mean of its divisors is an integer number (25707).

2⁸⁵⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

85685 is a deficient number, since it is larger than the sum of its proper divisors (17143).

85685 is a wasteful number, since it uses less digits than its factorization.

85685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17142.

The product of its digits is 9600, while the sum is 32.

The square root of 85685 is about 292.7200027330. The cubic root of 85685 is about 44.0860917709.

The spelling of 85685 in words is "eighty-five thousand, six hundred eighty-five".