447

447 is an integer that comes after 446 and before 448. It is an odd, composite number with prime factorization 3 × 149, making it a semiprime and square-free. Its positive divisors are 1, 3, 149, and 447; the sum of the proper divisors is 153, which is less than 447, so 447 is classified as a deficient number.

In various bases, 447 is represented as binary 110111111, octal 667, and hexadecimal 0x1BF. In Roman numerals it is written CDXLVII.

As a decimal digit sum, 4 + 4 + 7 = 15, and the digital root is 6. The number is divisible by 3, not by 9, and is congruent to 3 modulo 4. Its prime factorization indicates it is not prime and has exactly four divisors.