686084439 has 4 divisors (see below), whose sum is σ = 914779256. Its totient is φ = 457389624.

The previous prime is 686084437. The next prime is 686084449. The reversal of 686084439 is 934480686.

686084439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 686084439 - 2¹ = 686084437 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 (686084437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114347404 + ... + 114347409.

It is an arithmetic number, because the mean of its divisors is an integer number (228694814).

Almost surely, 2^686084439 is an apocalyptic number.

686084439 is a deficient number, since it is larger than the sum of its proper divisors (228694817).

686084439 is a wasteful number, since it uses less digits than its factorization.

686084439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228694816.

The product of its (nonzero) digits is 995328, while the sum is 48.

The square root of 686084439 is about 26193.2136058178. The cubic root of 686084439 is about 881.9809193172.

The spelling of 686084439 in words is "six hundred eighty-six million, eighty-four thousand, four hundred thirty-nine".