685715723 has 16 divisors (see below), whose sum is σ = 905209344. Its totient is φ = 502892160.

The previous prime is 685715717. The next prime is 685715729. The reversal of 685715723 is 327517586.

It is a happy number.

685715723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (685715717) and next prime (685715729).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685715723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685715729) 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, 260615 + ... + 263232.

It is an arithmetic number, because the mean of its divisors is an integer number (56575584).

Almost surely, 2^685715723 is an apocalyptic number.

685715723 is a deficient number, since it is larger than the sum of its proper divisors (219493621).

685715723 is a wasteful number, since it uses less digits than its factorization.

685715723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523882.

The product of its digits is 352800, while the sum is 44.

The square root of 685715723 is about 26186.1742719321. The cubic root of 685715723 is about 881.8228927284.

The spelling of 685715723 in words is "six hundred eighty-five million, seven hundred fifteen thousand, seven hundred twenty-three".