It has more than two factors.
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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.
Composite; its factors are 1, 3, 9, 27, 81, 243, 729
How about: 243 = 243.0
No because they are both composite numbers
The number is 243 because 243/243 = 1 and any number divided by itself is always equal to 1