71
29
The largest three digit prime number whose digits are all primes is 773.
The smallest two-digit prime number whose digits themselves are prime is 23. Both 2 and 3 are prime numbers, and together they form the prime number 23.
The largest 3 digit number whose digits are all primes is 777. The largest 3 digit number with different prime digits is 753.
67
29
The largest three digit prime number whose digits are all primes is 773.
The smallest two-digit prime number whose digits themselves are prime is 23. Both 2 and 3 are prime numbers, and together they form the prime number 23.
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.
The largest 3 digit number whose digits are all primes is 777. The largest 3 digit number with different prime digits is 753.
67
97969
9409
6859
121
961
7777