I insist .... 493

four hundred ninty-three (493)

CDXCI

I'm running out of ways to say .... 493

491!

Back up again :)

493

(I got in before your 489 :P )

Isn't it amazing, the sort of thing a bunch of apparently intelligent individuals find amusing?
491

493 !!!!1111eleventy-one!!!

491 = 0b111101011

Obvious Google, this comes up for: "491 in binary".

489.

Hmm, try calculator, but good to know about google :)

489

Nope: 487!

483. Nothing clever - I'm supposed to be parsing PHP function calls

(my bad - moving too fast!)