685116 has 18 divisors (see below), whose sum is σ = 1731912. Its totient is φ = 228360.

The previous prime is 685109. The next prime is 685123. The reversal of 685116 is 611586.

685116 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (685109) and next prime (685123).

It is a tau number, because it is divible by the number of its divisors (18).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 685116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9480 + ... + 9551.

2⁶⁸⁵¹¹⁶ is an apocalyptic number.

It is an amenable number.

685116 is an abundant number, since it is smaller than the sum of its proper divisors (1046796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

685116 is a wasteful number, since it uses less digits than its factorization.

685116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19041 (or 19036 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 685116 is about 827.7173430586. The cubic root of 685116 is about 88.1565738680.

It can be divided in two parts, 68 and 5116, that added together give a square (5184 = 72²).

The spelling of 685116 in words is "six hundred eighty-five thousand, one hundred sixteen".