684964 has 24 divisors (see below), whose sum is σ = 1451520. Its totient is φ = 276096.

The previous prime is 684961. The next prime is 684973. The reversal of 684964 is 469486.

684964 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244 + ... + 1195.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

2⁶⁸⁴⁹⁶⁴ is an apocalyptic number.

It is an amenable number.

684964 is an abundant number, since it is smaller than the sum of its proper divisors (766556).

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

684964 is a wasteful number, since it uses less digits than its factorization.

684964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467 (or 1465 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 684964 is about 827.6255191812. The cubic root of 684964 is about 88.1500539063.

The spelling of 684964 in words is "six hundred eighty-four thousand, nine hundred sixty-four".