684966 has 8 divisors (see below), whose sum is σ = 1369944. Its totient is φ = 228320.

The previous prime is 684961. The next prime is 684973. The reversal of 684966 is 669486.

684966 is nontrivially palindromic in base 5.

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

684966 is an admirable number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 684966.

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

684966 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 57075 + ... + 57086.

It is an arithmetic number, because the mean of its divisors is an integer number (171243).

2⁶⁸⁴⁹⁶⁶ is an apocalyptic number.

684966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

684966 is a wasteful number, since it uses less digits than its factorization.

684966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114166.

The product of its digits is 62208, while the sum is 39.

The square root of 684966 is about 827.6267274563. The cubic root of 684966 is about 88.1501397015.

It can be divided in two parts, 6 and 84966, that multiplied together give a square (509796 = 714²).

The spelling of 684966 in words is "six hundred eighty-four thousand, nine hundred sixty-six".