686878443 has 12 divisors (see below), whose sum is σ = 1044376840. Its totient is φ = 433817856.

The previous prime is 686878441. The next prime is 686878447. The reversal of 686878443 is 344878686.

It is not a de Polignac number, because 686878443 - 2¹ = 686878441 is a prime.

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 686878443.

It is not an unprimeable number, because it can be changed into a prime (686878441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2008246 + ... + 2008587.

Almost surely, 2^686878443 is an apocalyptic number.

686878443 is a deficient number, since it is larger than the sum of its proper divisors (357498397).

686878443 is a wasteful number, since it uses less digits than its factorization.

686878443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4016858 (or 4016855 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 54.

The square root of 686878443 is about 26208.3658971711. The cubic root of 686878443 is about 882.3210263366.

The spelling of 686878443 in words is "six hundred eighty-six million, eight hundred seventy-eight thousand, four hundred forty-three".