443009 has 6 divisors (see below), whose sum is σ = 515394. Its totient is φ = 379680.

The previous prime is 442997. The next prime is 443011. The reversal of 443009 is 900344.

It can be written as a sum of positive squares in only one way, i.e., 442225 + 784 = 665^2 + 28^2 .

It is not a de Polignac number, because 443009 - 2⁸ = 442753 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (443039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4472 + ... + 4569.

It is an arithmetic number, because the mean of its divisors is an integer number (85899).

2⁴⁴³⁰⁰⁹ is an apocalyptic number.

443009 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

443009 is a deficient number, since it is larger than the sum of its proper divisors (72385).

443009 is an equidigital number, since it uses as much as digits as its factorization.

443009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9055 (or 9048 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 443009 is about 665.5892126530. The cubic root of 443009 is about 76.2320355422.

The spelling of 443009 in words is "four hundred forty-three thousand, nine".