Because it has more than 2 factors, duh.
Composite
a prime number is a number that can only be divided by 1and its self... 1 isnt a prime number but 2, 3, 5, 7, 9, 11 etc... are prime numbers.
23, 37, 79 and 51 (assuming 1851 is a typo, 18 isnt a prime) if not a typo 1851 isnt a prime number anyway, it divides by 3
Composite
39 is not a prime number because it has four factors: 1,3,13,39 and because prime number are numbers who has 2 factors.
2 and 5 are, but 9 isnt because its factors are 1,3,and 9
no, 5 isnt divisable by 19. 19 is a prime number and isnt divisable by anything.
Actually, 9 is NOT a prime number.
9 is not a prime number.
Actually, 9 is NOT a prime number.
9 is not a prime number since 9 = 3*3. So 9 cannot be a prime number of 1269 or any other number.
9 is not prime