2340402209 has 2 divisors, whose sum is σ = 2340402210. Its totient is φ = 2340402208.

The previous prime is 2340402203. The next prime is 2340402217. The reversal of 2340402209 is 9022040432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2125486609 + 214915600 = 46103^2 + 14660^2 .

It is a cyclic number.

It is not a de Polignac number, because 2340402209 - 2⁴ = 2340402193 is a prime.

It is not a weakly prime, because it can be changed into another prime (2340402203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1170201104 + 1170201105.

It is an arithmetic number, because the mean of its divisors is an integer number (1170201105).

Almost surely, 2^2340402209 is an apocalyptic number.

It is an amenable number.

2340402209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2340402209 is an equidigital number, since it uses as much as digits as its factorization.

2340402209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 2340402209 is about 48377.7036350425. The cubic root of 2340402209 is about 1327.6904552114.

The spelling of 2340402209 in words is "two billion, three hundred forty million, four hundred two thousand, two hundred nine".