What is 9 to the power of 9 ?What is 9 to the power of 9 ?Solution: 99 = 387,420,489simplify this: All that is needed is to multiply it out:9 x 9 x 9 x 9 x 9 x 9 x 9 x 9 x 9 = 387,420,489 So, 9 to the power of 9 is 387,420,489.