Number Nine (9) - Numerical Digit
The number 9 precedes the number 10 and follows the number 8. 9 has divisors of 1 and 3 respectively, so it’s a composite number. Because it’s three times three, 9 is a square number.
It is the first composite lucky number, the first composite odd number, and the only composite odd number with only one digit. The decimal number 9 is the highest single-digit number with only one digit.
The first digit 9 was written by various Indians in the form of a question mark without the bottom dot. From there, the Kshatrapa, Andhra and Gupta curled the bottom vertical line to form a three-like design.
An inverted 6 is a good analogy for the modern digit. They are often underlined because they can be inverted on objects and documents. There is one other distinction from the 6 in the way it can be written: the stem is sometimes raised, like a raised lower-case q.
In Angel numbers, there is Angel number Four. You should check what exaclty the angel number Four meaning is.