Point 1: There is no such thing as an interger [sic]. I suspect you meant integer.
Point 2: Presuming that you did mean integer, an integer is a whole number.
Point 3: The square root of 39 is an irrational number. Pythagorean theorem:
So your question has no answer because there is no such thing as an interger [sic]. Or your question has no answer because there is no integer that when multiplied by itself results in a product equal to 39.
John
My calculator said it, I believe it, that settles it
