Maybe not a teen thing, but among children I think "because 789" could bring 789 into the discussion.
xkcd
A community for a webcomic of romance, sarcasm, math, and language.
231, twenty three is number one!
Further cementing that there is an xkcd for everything.
8647
0118 999 881 999 119 725 3
I think it's more of a 0118 999 88199 9119 725 3
Oh, that's easy to remember!
I've had a bit of a tumble
Where's 3.50?
It was about that time....
Get outa here ya lock ness
twennyone
You stoopid
Schfifty-five.
Shiggity shawh
There really is an xkcd for everything.
2137
42 is undeniably the funniest number
Sorry for the inconvenience.
If you're gonna include 23 skidoo... You should include being at sixes and sevens:
https://en.wikipedia.org/wiki/At_sixes_and_sevens
67... Is very very old British slang for wrecked/confused, at odds, or hysterical.
"I was all 6's and 7's"
Vague Austin Powers memory somewhere...
Dressed to the nines no less.
We better 86 it with all this numbers business tho.
They forgot 37.
My girlfriend acquired 37 limes In a row?!!
Try not to acquire any more on the way to the parking lot!

Deaf people - 258 (very interesting) and 84 (there's no good direct translation for this)
Huh, I had never considered deaf slang before. Is there somewhere to read up on this?
Hmm, it's hard to think of good resources for this. It's just kinda part of community. You could google asl slang and look around in YouTube or something. Or learn asl (or your country's sign language) and join the community.
Found a link with a short quip about 258 lol
Tree fiddy
I was reading Wikipedia about the origins of 23 and came across this neat tidbit:
On the RMS Titanic there was a watertight door on E Deck numbered 23 which was informally called the "skidoo door" according to the testimony of the Chief Baker Charles John Joughin.
23 also independently came to prominence with the 23 enigma, originating with William S. Burroughs and popularized by ‘The Illuminatus! Trilogy’ and ‘Principia Discordia’. It postulates that the number 23 appears to have significance suspiciously often.