685885199 has 24 divisors (see below), whose sum is σ = 753758208. Its totient is φ = 623356560.

The previous prime is 685885181. The next prime is 685885271. The reversal of 685885199 is 991588586.

685885199 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 685885199 - 2²⁸ = 417449743 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 (685885099) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1868714 + ... + 1869080.

It is an arithmetic number, because the mean of its divisors is an integer number (31406592).

Almost surely, 2^685885199 is an apocalyptic number.

685885199 is a deficient number, since it is larger than the sum of its proper divisors (67873009).

685885199 is a wasteful number, since it uses less digits than its factorization.

685885199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603 (or 584 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 59.

The square root of 685885199 is about 26189.4100544476. The cubic root of 685885199 is about 881.8955348361.

The spelling of 685885199 in words is "six hundred eighty-five million, eight hundred eighty-five thousand, one hundred ninety-nine".