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
How about: 773
The first '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.
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