Because 9 has more than 2 factors while 59 has only 2 factors.
1, (59 is a prime number)
easy.... 59
59
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
531 is not a prime number. Other than itself and one, it is also divisible by 3, 9, 59, and 177.
not by complete number 60 = 6 x 10 54 = 6 x 9 59 = 6 x 9.83333 also, 59 is a prime number.
2 and 5 are, but 9 isnt because its factors are 1,3,and 9
its 1 2 5 9 8 9 6 59 5 6 A prime number has only two factors.
It is: 59/9 = 6 and 5/9
because you can not divide 59 by 2,3,4,5,6,7,8,and 9.
Actually, 9 is NOT a prime number.