Q: Is 1,389,003 a Prime Number?
A: No, 1,389,003 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 1389003 can be evenly divided by 1 3 7 11 21 33 49 77 147 231 539 859 1,617 2,577 6,013 9,449 18,039 28,347 42,091 66,143 126,273 198,429 463,001 and 1,389,003, with no remainder.
Since 1,389,003 cannot be divided by just 1 and 1,389,003, it is not a prime number.