Jenny's Constant

How did I not know this? There is a Jenny's constant (for real!)!

As quoted in the above entry in the Online Encyclopedia of Integer Sequences:

First few digits reproduce the digits of the phone number in the song "867-5309/Jenny" performed by Tommy Tutone.

The next digit is a 0, and the following 4 digits (1, 9, 8, 1) are the year the song was recorded (1981). (Noticed by Rob Johnson of the explainxkcd.com forums)

(Tip of the cap to Nalini Joshi. Nalini's tweet included a link to this old xkcd (which I had forgotten about, and I don't think I had ever followed the rabbit hole about Jenny's constant.)