2544809 has 2 divisors, whose sum is σ = 2544810. Its totient is φ = 2544808.

The previous prime is 2544797. The next prime is 2544811. The reversal of 2544809 is 9084452.

2544809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2544025 + 784 = 1595^2 + 28^2 .

It is a cyclic number.

It is not a de Polignac number, because 2544809 - 2⁴ = 2544793 is a prime.

It is a Sophie Germain prime.

Together with 2544811, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2544209) 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, 1272404 + 1272405.

It is an arithmetic number, because the mean of its divisors is an integer number (1272405).

2^2544809 is an apocalyptic number.

It is an amenable number.

2544809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2544809 is an equidigital number, since it uses as much as digits as its factorization.

2544809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 2544809 is about 1595.2457490932. The cubic root of 2544809 is about 136.5269528639.

The spelling of 2544809 in words is "two million, five hundred forty-four thousand, eight hundred nine".