Why some unknown persons number is saved on my contact list?

[AC Question]

in my mobile phone frequently saved a number with name of 'share with friend' but i never ever add this number or ofcourse with that name. am very worried is my phone hacked? i delete it meny time but another it again saved in my contact list.. i also search this number on truecaller it says that 73 people make this number spam.. plz tell me what to do

 

[Tim1954]

Block the number from your contacts.