73 is the 21st prime number. Its mirror 37 is the 12th. Its prime number position of 21 is the result of 7x3. In binary, 73 is a palindrome, 1001001 which backwards is 1001001.
73 is the 21st prime number. Its mirror 37 is the 12th. Its prime number position of 21 is the result of 7x3. In binary, 73 is a palindrome, 1001001 which backwards is 1001001.