8479

8479 is a natural number that lies between 8478 and 8480. In mathematics, it is notable for being a semiprime, meaning it is the product of exactly two prime numbers.

8479 factors as 61 × 139, with 61 and 139 both prime. This gives the totient value φ(8479) = (61 − 1)(139 − 1) = 60 × 138 = 8280. The number is odd and not divisible by 2, 3, or 5, consistent with its prime factorization.

In common numeral systems, 8479 is represented as 10000100011111 in binary and as 0x211F in hexadecimal. The decimal representation is 8479. The sum of its decimal digits is 28, giving a digital root of 1.

As a semiprime, 8479 is of interest in elementary number theory and cryptographic contexts that study products of two primes, though it does not correspond to any widely recognized mathematical constant or famous sequence on its own. Its prime factors, 61 and 139, are themselves primes with no smaller nontrivial divisors, confirming its status as a product of two primes. Overall, 8479 is a straightforward example of a composite number with two prime factors, illustrating common properties of semiprimes in a compact form.