684946 has 8 divisors (see below), whose sum is σ = 1052604. Its totient is φ = 334080.

The previous prime is 684923. The next prime is 684949. The reversal of 684946 is 649486.

684946 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 657721 + 27225 = 811^2 + 165^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (684949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4095 + ... + 4258.

2⁶⁸⁴⁹⁴⁶ is an apocalyptic number.

684946 is a deficient number, since it is larger than the sum of its proper divisors (367658).

684946 is a wasteful number, since it uses less digits than its factorization.

684946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8396.

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

The square root of 684946 is about 827.6146446264. The cubic root of 684946 is about 88.1492817417.

The spelling of 684946 in words is "six hundred eighty-four thousand, nine hundred forty-six".