81
81 is a composite number.
81 is not prime it's a composite number
81 is a composite number. Composite numbers are any number that has more than two factors(one and itself). Therefore, since 3,9, and 27 are factors of 81 that makes it a composite number.
81 is an odd composite number.
29, 61, 23, 97, 41, and 67 are prime. 81, 51, 93, 77, and 39 are composite.
81 is a composite number.
61 and 71 are prime numbers the rest are composite numbers
81 is not prime it's a composite number
It is a composite number, you can get 81 by mulitpling 1*81, 3*27, and 9*9.compositeNo the number 81 is not prime it can be divided by nine.composite
81 is a composite number
Both 81 and 313968 are composite numbers.
81 is a composite number. Composite numbers are any number that has more than two factors(one and itself). Therefore, since 3,9, and 27 are factors of 81 that makes it a composite number.
It has more than two distinct factors; they are 1, 3, 9, 27, 81
81 is a composite number because it has more than two factors.
81 is an odd composite number.
81 is a composite number and it is also a square number
29, 61, 23, 97, 41, and 67 are prime. 81, 51, 93, 77, and 39 are composite.