2644409 has 2 divisors, whose sum is σ = 2644410. Its totient is φ = 2644408.

The previous prime is 2644403. The next prime is 2644429. The reversal of 2644409 is 9044462.

2644409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1638400 + 1006009 = 1280^2 + 1003^2 .

It is a cyclic number.

It is not a de Polignac number, because 2644409 - 2⁸ = 2644153 is a prime.

It is not a weakly prime, because it can be changed into another prime (2644403) 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 as a sum of consecutive naturals, namely, 1322204 + 1322205.

It is an arithmetic number, because the mean of its divisors is an integer number (1322205).

2^2644409 is an apocalyptic number.

It is an amenable number.

2644409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2644409 is an equidigital number, since it uses as much as digits as its factorization.

2644409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 2644409 is about 1626.1638908794. The cubic root of 2644409 is about 138.2853613437.

The spelling of 2644409 in words is "two million, six hundred forty-four thousand, four hundred nine".