The decimal 6,988 Number in the Braille Alphabet is
Número = Number sign. Means that it opens a number instead of a sequence of letters.
Milhar = Thousands sign. It is an option to use it.
All natural divisors of 6,988 are:
1, 2, 4, 1747, 3494, 6988
And that is the number factored 6,988 = 2 x 2 x 1747 (it is not prime)