447661 has 6 divisors (see below), whose sum is σ = 475850. Its totient is φ = 421056.

The previous prime is 447641. The next prime is 447677. The reversal of 447661 is 166744.

It can be written as a sum of positive squares in 3 ways, for example, as 145161 + 302500 = 381^2 + 550^2 .

It is not a de Polignac number, because 447661 - 2¹⁵ = 414893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 486 + ... + 1063.

2⁴⁴⁷⁶⁶¹ is an apocalyptic number.

It is an amenable number.

447661 is a deficient number, since it is larger than the sum of its proper divisors (28189).

447661 is a wasteful number, since it uses less digits than its factorization.

447661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583 (or 1566 counting only the distinct ones).

The product of its digits is 4032, while the sum is 28.

The square root of 447661 is about 669.0747342413. The cubic root of 447661 is about 76.4979423315.

The spelling of 447661 in words is "four hundred forty-seven thousand, six hundred sixty-one".