685795 has 16 divisors (see below), whose sum is σ = 924768. Its totient is φ = 483840.

The previous prime is 685793. The next prime is 685819. The reversal of 685795 is 597586.

It is a happy number.

It is not a de Polignac number, because 685795 - 2¹ = 685793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1867 + ... + 2203.

It is an arithmetic number, because the mean of its divisors is an integer number (57798).

2⁶⁸⁵⁷⁹⁵ is an apocalyptic number.

685795 is a deficient number, since it is larger than the sum of its proper divisors (238973).

685795 is a wasteful number, since it uses less digits than its factorization.

685795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390.

The product of its digits is 75600, while the sum is 40.

The square root of 685795 is about 828.1274056569. The cubic root of 685795 is about 88.1856874536.

Subtracting from 685795 its reverse (597586), we obtain a square (88209 = 297²).

The spelling of 685795 in words is "six hundred eighty-five thousand, seven hundred ninety-five".