685996 has 12 divisors (see below), whose sum is σ = 1209600. Its totient is φ = 340400.

The previous prime is 685991. The next prime is 686003. The reversal of 685996 is 699586.

It is not an unprimeable number, because it can be changed into a prime (685991) by changing a digit.

685996 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21 + ... + 1171.

It is an arithmetic number, because the mean of its divisors is an integer number (100800).

2⁶⁸⁵⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

685996 is a deficient number, since it is larger than the sum of its proper divisors (523604).

685996 is a wasteful number, since it uses less digits than its factorization.

685996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304 (or 1302 counting only the distinct ones).

The product of its digits is 116640, while the sum is 43.

The square root of 685996 is about 828.2487549040. The cubic root of 685996 is about 88.1943020745.

It can be divided in two parts, 685 and 996, that added together give a square (1681 = 41²).

The spelling of 685996 in words is "six hundred eighty-five thousand, nine hundred ninety-six".