Please.....Please do not put you Social Security Number on the 8710-1 or on the IACRA application! On the paper 8710-1 type in "Do Not Use". On the IACRA application check the box next to "Do Not Use".
There has been some problems with SSN on application vs. the ones on file. If there is a problem it is a real pain to get fixed. Since there isn't a requirement to give the FAA your SSN, Don't.