So, what you’re saying is that 91 is the smallestpositivenumberthatisthesumoftwocubesintwodifferentwaysiest number.
I’d argue it’s also the scariest number.
69 is the sexiest number.
36-24-36 is the 60s-est female number
90210 is the Zipcodiest number
867-5309 is the Jenny-est number
37 is the most symmetrical-but-doesn’t-look-it number.
Why? Because any three digit number, where the digits are all the same, is divisible by 37.
Ex: 555/37 = 15
Only in the film. In the book, it was Room 217. The reason, from Wikipedia:
It’s also the dirty deeds done cheapiest phone number
299,792,458 m/s is the speediest number.
3.3.3.3.5 is the snub icosidodecahedronal (or snub dodecahedronal) number.
45 is the panachiest number. 
I can’t decide if 1984 is the most Big-Brotheriest number, the Macintoshiest number or the Van-Haleniest number?
196 is the smallest Lychrel number candidate.
5705 is the quietest number.
From the song of the same name: “but there’s no reply”.
37 is also the “not old” number.
An infinite number of odd primes, and only one token even prime? Rank discrimination, I tell you! 
9199171357 is the giggitiest number.
Only if you add an “OH!” on the end.
21 is the drunkest number -
18 is the legalist number.
X is the crossest number. It’s also the most variable.
y?
2014 is the current-est number.
101 is also the dalmatianiest number.