685486123 has 16 divisors (see below), whose sum is σ = 826859520. Its totient is φ = 555140736.

The previous prime is 685486063. The next prime is 685486129. The reversal of 685486123 is 321684586.

685486123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 685486123 - 2¹³ = 685477931 is a prime.

It is a super-2 number, since 2×685486123² = 939782449651142258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 685486123.

It is not an unprimeable number, because it can be changed into a prime (685486129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44211 + ... + 57667.

It is an arithmetic number, because the mean of its divisors is an integer number (51678720).

Almost surely, 2^685486123 is an apocalyptic number.

685486123 is a deficient number, since it is larger than the sum of its proper divisors (141373397).

685486123 is a wasteful number, since it uses less digits than its factorization.

685486123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13866.

The product of its digits is 276480, while the sum is 43.

The square root of 685486123 is about 26181.7899120744. The cubic root of 685486123 is about 881.7244607149.

The spelling of 685486123 in words is "six hundred eighty-five million, four hundred eighty-six thousand, one hundred twenty-three".