At least my social security number is. I was reading Matt's blog (which I just found) and in it he mentions his was prime. After the first 4 quick tests, I figured it was worth running a rigorous analysis on mine. Apparently mine is prime as well.
The thing is that I think I've got him beat. The floor of the square root of my SSN is the zipcode for where I grew up. And it's not that far a rounding either.