685213 has 8 divisors (see below), whose sum is σ = 714240. Its totient is φ = 656880.

The previous prime is 685199. The next prime is 685231. The reversal of 685213 is 312586.

It is a happy number.

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 685213 - 2¹³ = 677021 is a prime.

It is a Duffinian number.

685213 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685513) 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 7 ways as a sum of consecutive naturals, for example, 2748 + ... + 2986.

It is an arithmetic number, because the mean of its divisors is an integer number (89280).

2⁶⁸⁵²¹³ is an apocalyptic number.

It is an amenable number.

685213 is a deficient number, since it is larger than the sum of its proper divisors (29027).

685213 is a wasteful number, since it uses less digits than its factorization.

685213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347.

The product of its digits is 1440, while the sum is 25.

The square root of 685213 is about 827.7759358667. The cubic root of 685213 is about 88.1607341290.

Adding to 685213 its reverse (312586), we get a palindrome (997799).

It can be divided in two parts, 685 and 213, that added together give a palindrome (898).

The spelling of 685213 in words is "six hundred eighty-five thousand, two hundred thirteen".