php 1.000.000 is not deducted from $ _GET number

Thanks for wanting to help me. There is a problem - the number is specified using the $ _GET parameter, there are checks that this number, etc., but you cannot deduct 1.000.000 from this number, it displays the same number, these are the main parts of the code:

(Comid parameter = 1000006)

$id = $_GET["comid"]; .... $id -= 1000000; echo $id; 

Conclusion:

 1000006 

What to do?

The most interesting thing to check is:

 if($id < 1000000) {} 

It passes right