The number 3 is considered favorable for Sagittarius individuals. Numbers such as 3, 12, 21, 30, 39, 48, 57, 66, 75, and so on are considered lucky for them. Besides, 9 is also auspicious. Numbers 4, 7, and 8 are neutral, while 5 and 6 are considered inauspicious. It is essential for them to pay attention to the significance of these numbers in their lives.