9647

9647 is a natural number that follows 9646 and precedes 9648. It is a four-digit, odd integer and, in number-theory terms, a semiprime.

Its prime factorization is 9647 = 11 × 877, where both 11 and 877 are prime. This makes 9647 a product of exactly two primes, and it has four divisors: 1, 11, 877, and 9647. The number is not divisible by 2, 3, 5, or 7.

The sum of its decimal digits is 26, giving a digital root of 8. In modular arithmetic, 9647 ≡ 2 (mod 3) and 9647 ≡ 3 (mod 4).

In other bases, 9647 can be represented as binary 10010110101111₂, octal 22657₈, and hexadecimal 25AF₁₆. In decimal notation, the value remains 9,647.

As a semiprime, 9647 is not a prime but is the product of two primes. Semiprimes are of interest in certain areas of number theory and have relevance in introductory cryptography as simple composite examples.