1.6 is not a whole number so you cannot write it "in whole number".
9.3 x 107
It is: 9.3*10^7 in scientific notation
13/12 is not a whole number and so you cannot write it as a whole number.
The number 93,000,000 written as a Roman numeral would be [XCIII] with a horizontal bar placed above it (which I can't write with my keyboard).
50000 is a whole number
5 is a whole number.
The number in scientific notation is 9.3x107.
It is 93000000