Q: Is 163,821 a Prime Number?
A: No, 163,821 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 163821 can be evenly divided by 1 3 7 21 29 87 203 269 609 807 1,883 5,649 7,801 23,403 54,607 and 163,821, with no remainder.
Since 163,821 cannot be divided by just 1 and 163,821, it is not a prime number.