544009 has 2 divisors, whose sum is σ = 544010. Its totient is φ = 544008.

The previous prime is 544007. The next prime is 544013. The reversal of 544009 is 900445.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 278784 + 265225 = 528^2 + 515^2 .

It is a cyclic number.

It is not a de Polignac number, because 544009 - 2¹ = 544007 is a prime.

Together with 544007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (544001) 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 as a sum of consecutive naturals, namely, 272004 + 272005.

It is an arithmetic number, because the mean of its divisors is an integer number (272005).

2⁵⁴⁴⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

544009 is a deficient number, since it is larger than the sum of its proper divisors (1).

544009 is an equidigital number, since it uses as much as digits as its factorization.

544009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 544009 is about 737.5696577273. The cubic root of 544009 is about 81.6335522184.

The spelling of 544009 in words is "five hundred forty-four thousand, nine".