684996 has 24 divisors (see below), whose sum is σ = 1721664. Its totient is φ = 210720.

The previous prime is 684989. The next prime is 685001. The reversal of 684996 is 699486.

684996 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

684996 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 7 ways as a sum of consecutive naturals, for example, 2040 + ... + 2351.

It is an arithmetic number, because the mean of its divisors is an integer number (71736).

2⁶⁸⁴⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

684996 is an abundant number, since it is smaller than the sum of its proper divisors (1036668).

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

684996 is a wasteful number, since it uses less digits than its factorization.

684996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4411 (or 4409 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 684996 is about 827.6448513704. The cubic root of 684996 is about 88.1514266100.

The spelling of 684996 in words is "six hundred eighty-four thousand, nine hundred ninety-six".