685340885 has 16 divisors (see below), whose sum is σ = 838221696. Its totient is φ = 537832128.

The previous prime is 685340861. The next prime is 685340891. The reversal of 685340885 is 588043586.

It is a cyclic number.

It is not a de Polignac number, because 685340885 - 2⁸ = 685340629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48887 + ... + 61323.

It is an arithmetic number, because the mean of its divisors is an integer number (52388856).

Almost surely, 2^685340885 is an apocalyptic number.

It is an amenable number.

685340885 is a deficient number, since it is larger than the sum of its proper divisors (152880811).

685340885 is a wasteful number, since it uses less digits than its factorization.

685340885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12652.

The product of its (nonzero) digits is 921600, while the sum is 47.

The square root of 685340885 is about 26179.0161197857. The cubic root of 685340885 is about 881.6621842573.

The spelling of 685340885 in words is "six hundred eighty-five million, three hundred forty thousand, eight hundred eighty-five".