73/Sheldon Cooper Exposition

The Sheldon Cooper Exposition on the Number $73$

Sheldon Cooper:

$73$ is the best number:

$73$ is the $21$st prime number.

Its mirror $37$ is the $12$th prime number.

Its mirror $21$ is the product of multiplying, hang on to your hats, $7$ by $3$.

Eh? Eh? Did I lie?

Leonard Hofstadter:

We get it. $73$ is the Chuck Norris of numbers.

Sheldon Cooper:

Chuck Norris wishes.

In binary, $73$ is a palindrome: $1,001,001$, which backwards is $1,001,001$, exactly the same.

All Chuck Norris backwards gets you is Sirron Kcuhc!

The Big Bang Theory, Episode $73$: Lee Aronsohn, Jim Reynolds and Maria Ferrari

Sources

• Nov. 2015: Jessie Byrnes, Chris Spicer and Alyssa Turnquist: The Sheldon Conjecture (Math Horizons Vol. 23: pp. 12 – 15)  www.jstor.org/stable/10.4169/mathhorizons.23.2.12