6493

6493 is a natural number in the decimal system, lying between 6492 and 6494. It is a composite number and can be factored into two primes: 43 and 151. Therefore, its prime factorization is 6493 = 43 × 151, and the only positive divisors are 1, 43, 151, and 6493. As a product of two distinct primes, 6493 is a semiprime and is square-free.

In terms of basic properties, 6493 is odd and congruent to 1 modulo 4. Its Euler totient is φ(6493) = (43 − 1)(151 − 1) = 42 × 150 = 6300. Because both prime factors are congruent to 3 modulo 4 and appear with exponent 1, 6493 cannot be expressed as a sum of two squares.

Representations in other bases include hexadecimal 0x195D, binary 1100101011101, and octal 14535. The digits of 6493 in base 10 are 6, 4, 9, and 3.

As a simple example in number theory, 6493 illustrates a semiprime, which is the product of exactly two primes. Such numbers are sometimes used in introductory discussions of factoring and cryptographic concepts, though 6493 itself is far too small to have cryptographic relevance.

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