685982 has 8 divisors (see below), whose sum is σ = 1122552. Its totient is φ = 311800.

The previous prime is 685973. The next prime is 685987. The reversal of 685982 is 289586.

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

It is a super-3 number, since 3×685982³ = 968410333448358504, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15569 + ... + 15612.

It is an arithmetic number, because the mean of its divisors is an integer number (140319).

2⁶⁸⁵⁹⁸² is an apocalyptic number.

685982 is a deficient number, since it is larger than the sum of its proper divisors (436570).

685982 is a wasteful number, since it uses less digits than its factorization.

685982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31194.

The product of its digits is 34560, while the sum is 38.

The square root of 685982 is about 828.2403032937. The cubic root of 685982 is about 88.1937021057.

The spelling of 685982 in words is "six hundred eighty-five thousand, nine hundred eighty-two".