9 letter word

Solve it :

It is a 9 letter word- 123456789.       
If u loose it, you die.
If you have 234, you can 1234. 😀

56 is one type of disease. 😞
89 indicates exact location & time 😃
2 & 7 are same letter
3 & 8 are same letter
5 & 9 are same letter                                               Guess the word !! 👍

Challenge for all masterminds !!