685835 has 8 divisors (see below), whose sum is σ = 834720. Its totient is φ = 540864.

The previous prime is 685819. The next prime is 685849. The reversal of 685835 is 538586.

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

It is a cyclic number.

It is not a de Polignac number, because 685835 - 2⁴ = 685819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 685795 and 685804.

It is an unprimeable 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 7 ways as a sum of consecutive naturals, for example, 575 + ... + 1304.

It is an arithmetic number, because the mean of its divisors is an integer number (104340).

2⁶⁸⁵⁸³⁵ is an apocalyptic number.

685835 is a deficient number, since it is larger than the sum of its proper divisors (148885).

685835 is a wasteful number, since it uses less digits than its factorization.

685835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1957.

The product of its digits is 28800, while the sum is 35.

The square root of 685835 is about 828.1515561780. The cubic root of 685835 is about 88.1874019402.

The spelling of 685835 in words is "six hundred eighty-five thousand, eight hundred thirty-five".