Can u solve

Solve this: Puzzle.😎☝🎆

Here is a list showing the month and a number for each month .
☝January 713
☝February 823
☝March 531
☝ April 542
☝May 351
☝June 462
☝July 471
☝ August 683

⚡Decode the logic and find the number for September = ?

🌞Challenge is OPEN 4 all GENIUS😇

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