it is the 21st prime number
it’s mirror, 37, is the 12th prime number
it’s mirror, 21, is the product of 3 and 7
in binary, 73 is a palindrome – 1001001
That’s why 73 is the best number!

73 is the best Number.
73 is the best number because:
it is the 21st prime number
it’s mirror, 37, is the 12th prime number
it’s mirror, 21, is the product of 3 and 7
in binary, 73 is a palindrome – 1001001
That’s why 73 is the best number!