101 is the smallest 3 digit Prime number.
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Smallest 3-digit even number is 100.
333 3 11 111
The number 27 has a cube root of 3, which is 2 (the smallest prime) plus 1.
The smallest number that is both odd and composite is 9, which is divisible by 3. The odd numbers are 1, 3, 5, 7, 9, 11, ..., and 1, 3, 5, and 7 are all prime. It is 9 that is the smallest odd composite number.
9999 is the 4-digit number and 999 is the 3-digit number.