33 has the factors ,3, & '11' ; it is composite
43 has no factors ; it is a Prime number
63 has the factors 3,7,9,21 ; it is composite.
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43 is a prime number because it has exactly two factors, 1 and 43. 33 and 63 each have 3 as a factor as well as 1 and themselves, so they are composite numbers.
43
A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite. 43 is a prime number.
63 has the factors 1, 3, 7, 9, 21, 63 43 is a prime number because there are no numbers that can divide into one and itself.
There isn't a prime number between 63 and 65
The prime factorization of 3x3x7 is 3^2 x 7. This can be simplified to 3x3x7 = 63. Therefore, the number with the prime factorization of 3x3x7 is 63.