108685 has 4 divisors (see below), whose sum is σ = 130428. Its totient is φ = 86944.

The previous prime is 108677. The next prime is 108707. The reversal of 108685 is 586801.

108685 = T₂₀₆ + T₂₀₇ + ... + T₂₁₀.

It is a happy number.

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 19881 + 88804 = 141^2 + 298^2 .

It is a cyclic number.

It is not a de Polignac number, because 108685 - 2³ = 108677 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, 10864 + ... + 10873.

It is an arithmetic number, because the mean of its divisors is an integer number (32607).

2¹⁰⁸⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

108685 is a deficient number, since it is larger than the sum of its proper divisors (21743).

108685 is an equidigital number, since it uses as much as digits as its factorization.

108685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21742.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 108685 is about 329.6740814805. The cubic root of 108685 is about 47.7225018250.

The spelling of 108685 in words is "one hundred eight thousand, six hundred eighty-five".