686786723 has 16 divisors (see below), whose sum is σ = 831985344. Its totient is φ = 553436160.

The previous prime is 686786717. The next prime is 686786753. The reversal of 686786723 is 327687686.

686786723 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 686786723 - 2⁴ = 686786707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686786713) 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, 127913 + ... + 133173.

It is an arithmetic number, because the mean of its divisors is an integer number (51999084).

Almost surely, 2^686786723 is an apocalyptic number.

686786723 is a deficient number, since it is larger than the sum of its proper divisors (145198621).

686786723 is a wasteful number, since it uses less digits than its factorization.

686786723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6382.

The product of its digits is 4064256, while the sum is 53.

The square root of 686786723 is about 26206.6160158079. The cubic root of 686786723 is about 882.2817519994.

The spelling of 686786723 in words is "six hundred eighty-six million, seven hundred eighty-six thousand, seven hundred twenty-three".