6905

6905 is a natural number that follows 6904 and precedes 6906. It is odd and divisible by 5, since its decimal representation ends in 5. The prime factorization is 6905 = 5 × 1381, where 1381 is a prime number. Therefore, 6905 is a semiprime and is square-free, having exactly four positive divisors: 1, 5, 1381, and 6905.

As a result of its factorization, 6905 is congruent to 5 modulo 6. In various bases, it has the representations: binary 1101011111001, hexadecimal 0x1AF9, and octal 15371.

Arithmetic functions for 6905 can be derived from its prime factors. The sum of divisors σ(6905) equals 1 + 5 + 1381 + 6905 = 8292. Euler’s totient function φ(6905) equals (5 − 1) × (1381 − 1) = 4 × 1380 = 5520, indicating there are 5520 integers in the range 1 to 6905 that are coprime to 6905.

In summary, 6905 is a composite, square-free semiprime, with a straightforward factorization and characteristic base representations. Its divisors, base representations, and values of standard arithmetic functions reflect its simple two-prime structure.