684812 has 6 divisors (see below), whose sum is σ = 1198428. Its totient is φ = 342404.

The previous prime is 684809. The next prime is 684829. The reversal of 684812 is 218486.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85598 + ... + 85605.

It is an arithmetic number, because the mean of its divisors is an integer number (199738).

2⁶⁸⁴⁸¹² is an apocalyptic number.

It is an amenable number.

684812 is a deficient number, since it is larger than the sum of its proper divisors (513616).

684812 is a wasteful number, since it uses less digits than its factorization.

684812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171207 (or 171205 counting only the distinct ones).

The product of its digits is 3072, while the sum is 29.

The square root of 684812 is about 827.5336851150. The cubic root of 684812 is about 88.1435329799.

The spelling of 684812 in words is "six hundred eighty-four thousand, eight hundred twelve".