The number 719168 can be written as 7 19 16 8

the number 7 coincides to alphabetic order of letter F plus 1

the number 19 coincides to alphabetic order of letter R plus 1

the number 16 coincides to alphabetic order of letter O plus 1

the number 8 coincides to alphabetic order of letter G plus 1

Then word TRIP

Alphabetic order of letter T is 20

alphabetic order of letter R is 18

alphabetic order of letter I is 9

alphabetic order of letter P is 16

Then the code will be 21191017