2899442809 has 2 divisors, whose sum is σ = 2899442810. Its totient is φ = 2899442808.

The previous prime is 2899442783. The next prime is 2899442849. The reversal of 2899442809 is 9082449982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2868673600 + 30769209 = 53560^2 + 5547^2 .

It is a cyclic number.

It is not a de Polignac number, because 2899442809 - 2⁹ = 2899442297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2899442809.

It is not a weakly prime, because it can be changed into another prime (2899442849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1449721404 + 1449721405.

It is an arithmetic number, because the mean of its divisors is an integer number (1449721405).

Almost surely, 2^2899442809 is an apocalyptic number.

It is an amenable number.

2899442809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2899442809 is an equidigital number, since it uses as much as digits as its factorization.

2899442809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2985984, while the sum is 55.

The square root of 2899442809 is about 53846.4744342654. The cubic root of 2899442809 is about 1425.9518104411.

The spelling of 2899442809 in words is "two billion, eight hundred ninety-nine million, four hundred forty-two thousand, eight hundred nine".