685331 has 8 divisors (see below), whose sum is σ = 725760. Its totient is φ = 645832.

The previous prime is 685319. The next prime is 685337. The reversal of 685331 is 133586.

685331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 685331 - 2¹⁴ = 668947 is a prime.

It is a super-2 number, since 2×685331² = 939357159122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 685331.

It is not an unprimeable number, because it can be changed into a prime (685337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1730 + ... + 2088.

It is an arithmetic number, because the mean of its divisors is an integer number (90720).

2⁶⁸⁵³³¹ is an apocalyptic number.

685331 is a deficient number, since it is larger than the sum of its proper divisors (40429).

685331 is a wasteful number, since it uses less digits than its factorization.

685331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465.

The product of its digits is 2160, while the sum is 26.

The square root of 685331 is about 827.8472081248. The cubic root of 685331 is about 88.1657945358.

The spelling of 685331 in words is "six hundred eighty-five thousand, three hundred thirty-one".