683685 has 12 divisors (see below), whose sum is σ = 1185132. Its totient is φ = 364608.

The previous prime is 683681. The next prime is 683687. The reversal of 683685 is 586386.

It can be written as a sum of positive squares in 2 ways, for example, as 509796 + 173889 = 714^2 + 417^2 .

It is not a de Polignac number, because 683685 - 2² = 683681 is a prime.

683685 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (683681) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 7552 + ... + 7641.

It is an arithmetic number, because the mean of its divisors is an integer number (98761).

2⁶⁸³⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

683685 is a deficient number, since it is larger than the sum of its proper divisors (501447).

683685 is a wasteful number, since it uses less digits than its factorization.

683685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15204 (or 15201 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 683685 is about 826.8524656793. The cubic root of 683685 is about 88.0951536169.

The spelling of 683685 in words is "six hundred eighty-three thousand, six hundred eighty-five".