685877 has 4 divisors (see below), whose sum is σ = 692640. Its totient is φ = 679116.

The previous prime is 685859. The next prime is 685907. The reversal of 685877 is 778586.

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 685877 - 2⁸ = 685621 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685177) 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, 3227 + ... + 3432.

It is an arithmetic number, because the mean of its divisors is an integer number (173160).

2⁶⁸⁵⁸⁷⁷ is an apocalyptic number.

It is an amenable number.

685877 is a deficient number, since it is larger than the sum of its proper divisors (6763).

685877 is a wasteful number, since it uses less digits than its factorization.

685877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6762.

The product of its digits is 94080, while the sum is 41.

The square root of 685877 is about 828.1769134672. The cubic root of 685877 is about 88.1892020793.

The spelling of 685877 in words is "six hundred eighty-five thousand, eight hundred seventy-seven".