how to put parentheses in the first three numbers?

i have a set numbers like 1234567890
how to put parentheses in the first three numbers?
result should be (123)4567890
thanks 
@HibachiSushiya said:
parentheses in the first three numbers?
My solution will take any number which is anywhere on a line and is at least 3 digits long.
The regular expression is:
Find What:([^09])(\d{3})(\d+)*
Replace With:\1\(\2\)\3
So the search mode is ‘regular expression’ and tick ‘wrap around’.The following is what I used for testing
website 345678 1234 trevor3456 never always 7826242 123
and the regex produces
website (345)678 (123)4 trevor(345)6 never always (782)6242 (123)
See if that helps. If an issue then you will need to expand on where the issue occurs and if there are other situations where you do (or not) want the numbers bracketed.
Terry

@TerryR said:
([^09])(\d{3})(\d+)*
With data like,
4321 trevor3456 never website 345678 1234 trevor3456 never always 7826242 123
It will miss the first number “4321”, because there is no newline before it. Changing to
(^[^09])(\d{3})(\d+)*
will fix it: the^[^09]
says “match the beginning of a line, or a nondigit character”. 
@PeterJones said:
With data like
Thanks Peter, I was trying to cover as many variations as possible, forgot the ‘very first’ character one. It got me to thinking if perhaps I might have over complicated it a bit.
A couple of minutes work with your ‘data like’ example I got all the required numbers using:
Find What:(\d{3})(\d+)*
Replace With:\(\1\)\2
(432)1 trevor(345)6 never website (345)678 (123)4 trevor(345)6 never always (782)6242 (123)
It seems I don’t need to force the regex to check for a ‘word boundary’ (change between digit and ‘other character’) as it does it itself with the remainder of the regex. So just discarding the first option does not appear to change the outcome.
Cheers
Terry