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.
800 2x2x2x2x2x5x5
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.
929
997 is the last 3 digit prime number