5440009 has 2 divisors, whose sum is σ = 5440010. Its totient is φ = 5440008.

The previous prime is 5440007. The next prime is 5440013. The reversal of 5440009 is 9000445.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3822025 + 1617984 = 1955^2 + 1272^2 .

It is a cyclic number.

It is not a de Polignac number, because 5440009 - 2¹ = 5440007 is a prime.

Together with 5440007, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (5440007) 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, 2720004 + 2720005.

It is an arithmetic number, because the mean of its divisors is an integer number (2720005).

Almost surely, 2^5440009 is an apocalyptic number.

It is an amenable number.

5440009 is a deficient number, since it is larger than the sum of its proper divisors (1).

5440009 is an equidigital number, since it uses as much as digits as its factorization.

5440009 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 5440009 is about 2332.3826872964. The cubic root of 5440009 is about 175.8732838752.

The spelling of 5440009 in words is "five million, four hundred forty thousand, nine".