Q: Is 400,197 a Prime Number?
A: No, 400,197 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 400197 can be evenly divided by 1 3 7 17 19 21 51 57 59 119 133 177 323 357 399 413 969 1,003 1,121 1,239 2,261 3,009 3,363 6,783 7,021 7,847 19,057 21,063 23,541 57,171 133,399 and 400,197, with no remainder.
Since 400,197 cannot be divided by just 1 and 400,197, it is not a prime number.