The prime factorization of 999999999 is:
$$ 999999999 = 3\cdot3\cdot3\cdot3\cdot37\cdot333667 $$Which is the same as :
$$ 999999999 = 3^{4}\cdot37\cdot333667 $$Prime factorization can be nicely visualized by creating a factorization tree.
| 999999999 can be written as 3 × 333333333. |
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| 333333333 can be written as 3 × 111111111. |
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| 111111111 can be written as 3 × 37037037. |
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| 37037037 can be written as 3 × 12345679. |
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| 12345679 can be written as 37 × 333667. |
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| The end nodes are the prime factors of the number 999999999. |
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