685303 has 4 divisors (see below), whose sum is σ = 687040. Its totient is φ = 683568.

The previous prime is 685301. The next prime is 685319. The reversal of 685303 is 303586.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 685303 - 2¹ = 685301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685301) by changing a digit.

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, 43 + ... + 1171.

It is an arithmetic number, because the mean of its divisors is an integer number (171760).

2⁶⁸⁵³⁰³ is an apocalyptic number.

685303 is a deficient number, since it is larger than the sum of its proper divisors (1737).

685303 is a wasteful number, since it uses less digits than its factorization.

685303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 685303 is about 827.8302966188. The cubic root of 685303 is about 88.1645938139.

Adding to 685303 its reverse (303586), we get a palindrome (988889).

The spelling of 685303 in words is "six hundred eighty-five thousand, three hundred three".