Are shortened URI to Stack Exchange questions stable?

Question

URI to questions on Stack Exchange may be shortened from:

http://stackoverflow.com/questions/123456789/my-popular-question

to:

http://stackoverflow.com/questions/123456789

Suppose you've been keeping notes locally about your findings on Stack Exchange communities in plain-text files, and that a great number of those plain-text files contain shortened URI to questions on Stack Exchange communities.

My question is: is it safe to write down the shortened URI? Or rather, is the shortened URI stable?

The URI provided by the share button is somewhat different from what I'm calling a shortened URI.

Answer 1

In as far as the number in the URI is the database ID of the post, and unless there's a change to the structure of the site, yes, they're stable.