2040343309 has 2 divisors, whose sum is σ = 2040343310. Its totient is φ = 2040343308.

The previous prime is 2040343289. The next prime is 2040343391. The reversal of 2040343309 is 9033430402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1606246084 + 434097225 = 40078^2 + 20835^2 .

It is a cyclic number.

It is not a de Polignac number, because 2040343309 - 2⁷ = 2040343181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2040346309) 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, 1020171654 + 1020171655.

It is an arithmetic number, because the mean of its divisors is an integer number (1020171655).

Almost surely, 2^2040343309 is an apocalyptic number.

It is an amenable number.

2040343309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2040343309 is an equidigital number, since it uses as much as digits as its factorization.

2040343309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 2040343309 is about 45170.1594971725. The cubic root of 2040343309 is about 1268.3362819945.

The spelling of 2040343309 in words is "two billion, forty million, three hundred forty-three thousand, three hundred nine".