7,625,597,484,987
1, 3, 9, 27, 81, 243, 729, 2187, 6561, 19683
The answer is 27
19683
3 to the 9th power is 3 is multiply by itself nine times i.e. 39 = 3x3x3x3x3x3x3x3x3 =19683
19,683 squared is 387,420,489.
39 = 3x3x3x3x3x3x3x3x3 =19683
3, 9, 27, 81, 243, 729, 2187, 6561, 19683, 59049
27, whose cube is 19683
3 to the 9th power and simplifyed is 19683
262144262144.
27 cubed is equal to 19683.
If 3x = 81 then x = 27 and 27 cubed = 19683