447649 has 4 divisors (see below), whose sum is σ = 467136. Its totient is φ = 428164.

The previous prime is 447641. The next prime is 447677. The reversal of 447649 is 946744.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 447649 - 2³ = 447641 is a prime.

It is a Duffinian number.

447649 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (447641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9709 + ... + 9754.

It is an arithmetic number, because the mean of its divisors is an integer number (116784).

2⁴⁴⁷⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

447649 is a deficient number, since it is larger than the sum of its proper divisors (19487).

447649 is a wasteful number, since it uses less digits than its factorization.

447649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19486.

The product of its digits is 24192, while the sum is 34.

The square root of 447649 is about 669.0657665731. The cubic root of 447649 is about 76.4972587908.

The spelling of 447649 in words is "four hundred forty-seven thousand, six hundred forty-nine".