7981

7981 is a natural number that comes after 7980 and before 7982. It is a four-digit odd number. In prime factorization terms, 7981 = 23 × 347. Since both 23 and 347 are primes, 7981 is a product of two distinct primes; thus it is squarefree and composite.

The digit sum is 25, so it is not divisible by 3. It is also not divisible by 2 or 5. The nearest perfect squares are 89^2 = 7921 and 90^2 = 8100, so 7981 lies between them, with a square root about 89.3.

In different positional numeral systems: binary 1111100101101_2; octal 17455_8; hexadecimal 1F2D_16. The base-10 representation is the standard form.

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