7869

7869 is an odd composite integer in the decimal system. It equals 3 × 43 × 61 and has eight positive divisors. Its prime factorization shows that it is squarefree.

The eight divisors are 1, 3, 43, 61, 129 (3×43), 183 (3×61), 2623 (43×61), and 7869 (3×43×61). Because it is the product of three distinct primes, 7869 is not a prime and its divisor count is (1+1)^3 = 8. The sum of divisors is 10912, so the sum of proper divisors is 3043, making 7869 a deficient number.

Euler's totient φ(7869) equals 5040, since φ(n) for a product of distinct primes is (p−1)(q−1)(r−1). The number's binary, hexadecimal, and octal representations are 1111010111101 in binary, 1EBD in hexadecimal, and 17275 in octal.

As a decimal number that factors into distinct primes, 7869 is squarefree and serves as an example in discussions of divisor structure, totients, and base representations. Its digit sum is 30, and its digital root is 3, independent of any particular numeral base beyond those noted above.