685727 has 4 divisors (see below), whose sum is σ = 783696. Its totient is φ = 587760.

The previous prime is 685723. The next prime is 685733. The reversal of 685727 is 727586.

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 685727 - 2² = 685723 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 (685723) 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, 48974 + ... + 48987.

It is an arithmetic number, because the mean of its divisors is an integer number (195924).

2⁶⁸⁵⁷²⁷ is an apocalyptic number.

685727 is a deficient number, since it is larger than the sum of its proper divisors (97969).

685727 is an equidigital number, since it uses as much as digits as its factorization.

685727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97968.

The product of its digits is 23520, while the sum is 35.

The square root of 685727 is about 828.0863481546. The cubic root of 685727 is about 88.1827726735.

The spelling of 685727 in words is "six hundred eighty-five thousand, seven hundred twenty-seven".