9998

9998 is a natural number that follows 9997 and precedes 9999. In the decimal system it is even and composite.

Prime factorization: 9998 = 2 × 4999, where 4999 is prime. Therefore 9998 is a semiprime. Its divisors are 1, 2, 4999, and 9998 (four positive divisors).

In common base representations, 9998 is 10011100001110 in binary, 23416 in octal, and 270E in hexadecimal. The sum of its decimal digits is 35, and it is not divisible by 3 or 9.

Close to a round number: 10000 − 2, 9998 is two less than ten thousand. This proximity to a power of ten often makes it convenient in examples and exercises that illustrate near-round numbers, parity, and factorization.

Overall, 9998 is an even semiprime with a simple factorization, and it serves as a typical example in elementary number theory contexts.