Number made up of 1's

If f(n)=111...11, where there are 'n' 1s, then what is the minimum value of n so that f(n) is divisible by 9, 13, and 17?

(Just in case you were confused, f(1)=1, f(2)=11, f(3)=111, f(4)=1111, f(5)=11111...)

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