447647 has 4 divisors (see below), whose sum is σ = 449760. Its totient is φ = 445536.

The previous prime is 447641. The next prime is 447677. The reversal of 447647 is 746744.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 447647 - 2¹² = 443551 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 447647.

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, 698 + ... + 1175.

It is an arithmetic number, because the mean of its divisors is an integer number (112440).

2⁴⁴⁷⁶⁴⁷ is an apocalyptic number.

447647 is a deficient number, since it is larger than the sum of its proper divisors (2113).

447647 is a wasteful number, since it uses less digits than its factorization.

447647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112.

The product of its digits is 18816, while the sum is 32.

The square root of 447647 is about 669.0642719500. The cubic root of 447647 is about 76.4971448662.

The spelling of 447647 in words is "four hundred forty-seven thousand, six hundred forty-seven".