753 is a Prime number. 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.
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It is prime
86 is not a prime number, so is a composite.
No 168 is not a prime number it is a composite number
NO!!! If you add the adigtis 2259 = 2 + 2 + 5 + 9 = 18 + 1 + 8 = 9 This means that the number will divide, has a factor of '9'. 2259/9= 251 So 2259 is a composite number, not a prime number.
composite