685889123 has 8 divisors (see below), whose sum is σ = 743949360. Its totient is φ = 629797120.

The previous prime is 685889119. The next prime is 685889147. The reversal of 685889123 is 321988586.

685889123 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 685889123 - 2² = 685889119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685889423) 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, 491333 + ... + 492726.

It is an arithmetic number, because the mean of its divisors is an integer number (92993670).

Almost surely, 2^685889123 is an apocalyptic number.

685889123 is a deficient number, since it is larger than the sum of its proper divisors (58060237).

685889123 is a wasteful number, since it uses less digits than its factorization.

685889123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984117.

The product of its digits is 829440, while the sum is 50.

The square root of 685889123 is about 26189.4849701173. The cubic root of 685889123 is about 881.8972166294.

The spelling of 685889123 in words is "six hundred eighty-five million, eight hundred eighty-nine thousand, one hundred twenty-three".