999.
The largest three digit prime number whose digits are all primes is 773.
997 is the highest number.It is 997.
101 997
995
961
The first 'three digit' Prime Number is 101.
How about: 773
The smallest three digit prime number is 101.
The largest two-digit number with exactly three factors is 99. A number has exactly three factors if it is the square of a prime number, specifically in the form ( p^2 ) where ( p ) is a prime. The only prime number whose square is a two-digit number is 7, since ( 7^2 = 49 ) and ( 11^2 = 121 ) exceeds two digits. Thus, 49 is the largest two-digit number with exactly three factors.
800 2x2x2x2x2x5x5
929
There is no three digit prime number whose square root is a prime number. Prime numbers have no factors other than 1 and themselves. Any number having a prime number as a square root is a composite number.