685277 has 4 divisors (see below), whose sum is σ = 703836. Its totient is φ = 666720.

The previous prime is 685271. The next prime is 685297. The reversal of 685277 is 772586.

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

It can be written as a sum of positive squares in 2 ways, for example, as 657721 + 27556 = 811^2 + 166^2 .

It is a cyclic number.

It is not a de Polignac number, because 685277 - 2¹⁶ = 619741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 685277.

It is not an unprimeable number, because it can be changed into a prime (685271) 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, 9224 + ... + 9297.

It is an arithmetic number, because the mean of its divisors is an integer number (175959).

2⁶⁸⁵²⁷⁷ is an apocalyptic number.

It is an amenable number.

685277 is a deficient number, since it is larger than the sum of its proper divisors (18559).

685277 is a wasteful number, since it uses less digits than its factorization.

685277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18558.

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

The square root of 685277 is about 827.8145927682. The cubic root of 685277 is about 88.1634788285.

The spelling of 685277 in words is "six hundred eighty-five thousand, two hundred seventy-seven".