685699 has 8 divisors (see below), whose sum is σ = 817920. Its totient is φ = 562056.

The previous prime is 685697. The next prime is 685717. The reversal of 685699 is 996586.

685699 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 685699 - 2¹ = 685697 is a prime.

It is a Duffinian number.

685699 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (685697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1969 + ... + 2290.

It is an arithmetic number, because the mean of its divisors is an integer number (102240).

2⁶⁸⁵⁶⁹⁹ is an apocalyptic number.

685699 is a deficient number, since it is larger than the sum of its proper divisors (132221).

685699 is a wasteful number, since it uses less digits than its factorization.

685699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4289.

The product of its digits is 116640, while the sum is 43.

The square root of 685699 is about 828.0694415325. The cubic root of 685699 is about 88.1815724139.

The spelling of 685699 in words is "six hundred eighty-five thousand, six hundred ninety-nine".