2809349 has 2 divisors, whose sum is σ = 2809350. Its totient is φ = 2809348.

The previous prime is 2809343. The next prime is 2809351. The reversal of 2809349 is 9439082.

2809349 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., 2788900 + 20449 = 1670^2 + 143^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2809349 is a prime.

Together with 2809351, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2809343) 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, 1404674 + 1404675.

It is an arithmetic number, because the mean of its divisors is an integer number (1404675).

2^2809349 is an apocalyptic number.

It is an amenable number.

2809349 is a deficient number, since it is larger than the sum of its proper divisors (1).

2809349 is an equidigital number, since it uses as much as digits as its factorization.

2809349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 2809349 is about 1676.1112731558. Note that the first 3 decimals coincide. The cubic root of 2809349 is about 141.1026698863.

The spelling of 2809349 in words is "two million, eight hundred nine thousand, three hundred forty-nine".