or
or
The numbers 53, 73, and 83 are all prime numbers (numbers that are divisible only by 1 and themselves). In contrast, 63 is not a prime number; it is divisible by numbers other than 1 and itself (specifically, it is divisible by 3 and 21). Therefore, 63 is the number that does not belong to the group of prime numbers (53, 73, 83).
