There is no such number. If the four digits are even, the entire number is even, not odd.
The largest 3 digit number whose digits are all primes is 777. The largest 3 digit number with different prime digits is 753.
The largest three digit prime number whose digits are all primes is 773.
992
7777
There are no 3-digit whole numbers whose digits sum to 3. The smallest 3-digit number is 100, and the largest is 999, but in neither case is the sum of the digits equal to 3.
The largest 3 digit number whose digits are all primes is 777. The largest 3 digit number with different prime digits is 753.
The largest three digit prime number whose digits are all primes is 773.
992
7777
How about: 773
99
61 is prime. You cannot make 61 by multiplying four digits.
Find a four digit number whose digits will be reversed when multiplied by nine?
773.
There are no 3-digit whole numbers whose digits sum to 3. The smallest 3-digit number is 100, and the largest is 999, but in neither case is the sum of the digits equal to 3.
The largest three-digit number whose digits sum to 13 is 940. This is because the number must start with the highest possible digit, which is 9. To achieve a digit sum of 13, the next two digits must total 4, and the highest combination is 4 and 0, giving us 940.
Smallest is 11 & Largest is 77.