409 is a prime number.
233357 is a prime number.
5
23 is a prime number.
Each composite number has its own unique prime factorization.
An unlimited number.
It is: 225
5
At least two.
Dumb...its 3 and 3...
Just one.
23 is a prime number so there is no prime factorization. Some consider it to be acceptable to write 1 X 23 in order to show the number is prime, even though 1 is not a prime or composite number.23 is already prime.