684916 has 12 divisors (see below), whose sum is σ = 1213632. Its totient is φ = 338168.

The previous prime is 684889. The next prime is 684923. The reversal of 684916 is 619486.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 700 + ... + 1363.

It is an arithmetic number, because the mean of its divisors is an integer number (101136).

2⁶⁸⁴⁹¹⁶ is an apocalyptic number.

It is an amenable number.

684916 is a deficient number, since it is larger than the sum of its proper divisors (528716).

684916 is a wasteful number, since it uses less digits than its factorization.

684916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150 (or 2148 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 684916 is about 827.5965200507. The cubic root of 684916 is about 88.1479947706.

It can be divided in two parts, 684 and 916, that added together give a square (1600 = 40²).

The spelling of 684916 in words is "six hundred eighty-four thousand, nine hundred sixteen".