685946 has 8 divisors (see below), whose sum is σ = 1044480. Its totient is φ = 337788.

The previous prime is 685939. The next prime is 685963. The reversal of 685946 is 649586.

685946 is nontrivially palindromic in base 16.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 2426 + ... + 2693.

It is an arithmetic number, because the mean of its divisors is an integer number (130560).

2⁶⁸⁵⁹⁴⁶ is an apocalyptic number.

685946 is a deficient number, since it is larger than the sum of its proper divisors (358534).

685946 is a wasteful number, since it uses less digits than its factorization.

685946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5188.

The product of its digits is 51840, while the sum is 38.

The square root of 685946 is about 828.2185701854. The cubic root of 685946 is about 88.1921592912.

The spelling of 685946 in words is "six hundred eighty-five thousand, nine hundred forty-six".