No, it is not.
180divided by4 = 45
420 divided by4 = 105
3 divided by4 = 0.75
91 divided by4 = 22.75
20 divided by4 = 5
4 by 4 by4 by4
No.
No.
18.5
21.5
yes 91 is divisable by 7 and 13 so no it isnt a prime #
102,068,001 is NOT a prime number. It is evenly divisable by 3. A prime number is only evenly divisable by 1 and itself. It is also divisable by 9.