685313 has 4 divisors (see below), whose sum is σ = 688560. Its totient is φ = 682068.

The previous prime is 685301. The next prime is 685319. The reversal of 685313 is 313586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 685313 - 2⁴ = 685297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1283 + ... + 1736.

It is an arithmetic number, because the mean of its divisors is an integer number (172140).

2⁶⁸⁵³¹³ is an apocalyptic number.

It is an amenable number.

685313 is a deficient number, since it is larger than the sum of its proper divisors (3247).

685313 is a wasteful number, since it uses less digits than its factorization.

685313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3246.

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

The square root of 685313 is about 827.8363364820. The cubic root of 685313 is about 88.1650226469.

Adding to 685313 its reverse (313586), we get a palindrome (998899).

The spelling of 685313 in words is "six hundred eighty-five thousand, three hundred thirteen".