7989is an odd number,as it is not divisible by 2
The factors for 7989 are all the numbers between -7989 and 7989 , which divide 7989 without leaving any remainder. Since 7989 divided by -7989 is an integer, -7989 is a factor of 7989 .
Since 7989 divided by -7989 is a whole number, -7989 is a factor of 7989
Since 7989 divided by -2663 is a whole number, -2663 is a factor of 7989
Since 7989 divided by -3 is a whole number, -3 is a factor of 7989
Since 7989 divided by -1 is a whole number, -1 is a factor of 7989
Multiples of 7989 are all integers divisible by 7989 , i.e. the remainder of the full division by 7989 is zero. There are infinite multiples of 7989. The smallest multiples of 7989 are:
It is possible to determine using mathematical techniques whether an integer is prime or not.
for 7989, the answer is: No, 7989 is not a prime number.
To know the primality of an integer, we can use several algorithms. The most naive is to try all divisors below the number you want to know if it is prime (in our case 7989). We can already eliminate even numbers bigger than 2 (then 4 , 6 , 8 ...). Besides, we can stop at the square root of the number in question (here 89.381 ). Historically, the Eratosthenes screen (which dates back to Antiquity) uses this technique relatively effectively.
More modern techniques include the Atkin screen, probabilistic tests, or the cyclotomic test.
Previous prime number: 7963
Next prime number: 7993