23 or 41
773.
9409
961
It can be 30 whose prime factors are 2, 3 and 5
The largest three digit prime number whose digits are all primes is 773.
The largest 3 digit number whose digits are all primes is 777. The largest 3 digit number with different prime digits is 753.
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.
7777
Two-digit prime numbers whose digits add up to 10 are:193773
How about: 773
The only two digit numbers whose digits add up to 17 are 89 and 98. Since 98 is an even number, 89 is prime.
23 or 41
773.
61 is prime. You cannot make 61 by multiplying four digits.
-5
it is 23 because 2+3 = 5