2099902309 has 2 divisors, whose sum is σ = 2099902310. Its totient is φ = 2099902308.

The previous prime is 2099902229. The next prime is 2099902313. The reversal of 2099902309 is 9032099902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1149413409 + 950488900 = 33903^2 + 30830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2099902309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2099902349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1049951154 + 1049951155.

It is an arithmetic number, because the mean of its divisors is an integer number (1049951155).

Almost surely, 2^2099902309 is an apocalyptic number.

It is an amenable number.

2099902309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2099902309 is an equidigital number, since it uses as much as digits as its factorization.

2099902309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 2099902309 is about 45824.6910409661. The cubic root of 2099902309 is about 1280.5593073686.

The spelling of 2099902309 in words is "two billion, ninety-nine million, nine hundred two thousand, three hundred nine".