Most of the Easter eggs are drawn from pop culture and are easily understood by most viewers. However, some references require a rewatch so fans can uncover the hidden meanings. Rooted in sci-fi, Futurama also provides viewers with many science jokes. The series' connections are inclusive of many fanbases and even integrated obscure Easter eggs as a nod to niche interests.
Some audiences might've noticed the repetition of "1729" throughout the series; however, not every viewer could decipher the significance. The Hardy-Ramanujan or taxicab number also appears in the registration of Nimbus (BP-1729); this vital ship leads the Democratic Order of Planets into war.
Bender receives a holiday card saying, "Merry Xmas son #1729," in "Xmas Story" from his mother. Likewise, "The Farnsworth Parabox" takes the Planet Express team to different parallel universes, including Universe 1729. The creators took this Easter egg to the next level in "Bender's Big Score" by featuring a taxicab numbered after a variation of the "taxicab" number (87539319).