685273 has 4 divisors (see below), whose sum is σ = 721360. Its totient is φ = 649188.

The previous prime is 685271. The next prime is 685297. The reversal of 685273 is 372586.

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 685273 - 2¹ = 685271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685271) 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 3 ways as a sum of consecutive naturals, for example, 18015 + ... + 18052.

It is an arithmetic number, because the mean of its divisors is an integer number (180340).

2⁶⁸⁵²⁷³ is an apocalyptic number.

It is an amenable number.

685273 is a deficient number, since it is larger than the sum of its proper divisors (36087).

685273 is a wasteful number, since it uses less digits than its factorization.

685273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36086.

The product of its digits is 10080, while the sum is 31.

The square root of 685273 is about 827.8121767648. The cubic root of 685273 is about 88.1633072898.

The spelling of 685273 in words is "six hundred eighty-five thousand, two hundred seventy-three".