685932867 has 20 divisors (see below), whose sum is σ = 1028911400. Its totient is φ = 457275456.

The previous prime is 685932859. The next prime is 685932883. The reversal of 685932867 is 768239586.

It is a happy number.

It is not a de Polignac number, because 685932867 - 2³ = 685932859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685932817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2259 + ... + 37107.

It is an arithmetic number, because the mean of its divisors is an integer number (51445570).

Almost surely, 2^685932867 is an apocalyptic number.

685932867 is a deficient number, since it is larger than the sum of its proper divisors (342978533).

685932867 is an frugal number, since it uses more digits than its factorization.

685932867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34876 (or 34852 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 685932867 is about 26190.3201011366. The cubic root of 685932867 is about 881.9159645049.

The spelling of 685932867 in words is "six hundred eighty-five million, nine hundred thirty-two thousand, eight hundred sixty-seven".