If a teacher divides the students into three groups each group has the same number of students is the number prime or composite?

If a teacher divides the students into three groups with the same number of students in each group, the total number of students must be divisible by three. This means the total number of students can be expressed as 3 times another whole number. Since it has divisors other than 1 and itself, the total number of students is composite, assuming there are at least six students (as three groups of two is the smallest case for equal groups).