684982 has 8 divisors (see below), whose sum is σ = 1037952. Its totient is φ = 339000.

The previous prime is 684977. The next prime is 684989. The reversal of 684982 is 289486.

684982 is nontrivially palindromic in base 3.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684989) by changing a digit.

684982 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1494 + ... + 1897.

It is an arithmetic number, because the mean of its divisors is an integer number (129744).

2⁶⁸⁴⁹⁸² is an apocalyptic number.

684982 is a deficient number, since it is larger than the sum of its proper divisors (352970).

684982 is a wasteful number, since it uses less digits than its factorization.

684982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3494.

The product of its digits is 27648, while the sum is 37.

The square root of 684982 is about 827.6363935932. The cubic root of 684982 is about 88.1508260574.

It can be divided in two parts, 68 and 4982, that added together give a triangular number (5050 = T₁₀₀).

The spelling of 684982 in words is "six hundred eighty-four thousand, nine hundred eighty-two".