685894 has 8 divisors (see below), whose sum is σ = 1122408. Its totient is φ = 311760.

The previous prime is 685859. The next prime is 685907. The reversal of 685894 is 498586.

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

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 15567 + ... + 15610.

It is an arithmetic number, because the mean of its divisors is an integer number (140301).

2⁶⁸⁵⁸⁹⁴ is an apocalyptic number.

685894 is a deficient number, since it is larger than the sum of its proper divisors (436514).

685894 is a wasteful number, since it uses less digits than its factorization.

685894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31190.

The product of its digits is 69120, while the sum is 40.

The square root of 685894 is about 828.1871769111. The cubic root of 685894 is about 88.1899306862.

The spelling of 685894 in words is "six hundred eighty-five thousand, eight hundred ninety-four".