9881

9881 is a natural number that follows 9880 and precedes 9882. In mathematics, it is notable for being a composite semiprime, as its prime factorization is 41 × 241, with both factors prime. Consequently, 9881 has exactly four positive divisors: 1, 41, 241, and 9881.

In various base representations, 9881 can be written as 0x2699 in hexadecimal, 0o23231 in octal, and 10011010011001 in binary. These forms reflect its prime-factor structure and are useful in different computational contexts.

Numerically, 9881 is odd and not divisible by 3 or 5, since the sum of its digits is 26 and the digital root is 8. In modular arithmetic, 9881 ≡ 4 (mod 7). The number is not a palindrome in base 10, and its reverse, 1889, is not equal to 9881.

Beyond pure number theory, 9881 may appear as a model or catalog item in non-mathematical contexts, but the mathematical significance of 9881 rests on its status as a semiprime with the factor pair 41 and 241.