243 is a composite number. A Prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1, 2, and 0. 1, 2, and 0 have a different name.
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No because they are both composite numbers
Composite; its factors are 1, 3, 9, 27, 81, 243, 729
729 is composite because it has 7 factors: 1, 3, 9, 27, 81, 243, and 729.
4, composite. 67, prime.
Prime