1- Arabic is having a unique letter called D'aad (ض) which you will never find a similar letter in any other language on earth.
2- Arabic is an eastern language then it's written from right to left direction unlike the majority of the Western languages.
3- Arabic doesn't have the verb to be to describe what are you doing like I am Muhammad. which in Arabic should be I Muhammad أنا محمد.
4- Arabic numbers are derived from Arabic letters so,
number ۱ is very similar to letter ا Alef
and number ۳ with letter س Seen
and number ٤ with letter ع A'in
and number ٥ with letter ه Haa'.
I hope you enjoyed this and wait for my other Articles.
Best Wishes from Muhammad, Arabic teacher.