2099669849 has 2 divisors, whose sum is σ = 2099669850. Its totient is φ = 2099669848.

The previous prime is 2099669771. The next prime is 2099669851. The reversal of 2099669849 is 9489669902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1838265625 + 261404224 = 42875^2 + 16168^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2099669849 is a prime.

It is a super-2 number, since 2×2099669849² = 8817226949599365602, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 2099669851, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2099669791 and 2099669800.

It is not a weakly prime, because it can be changed into another prime (2099669449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1049834924 + 1049834925.

It is an arithmetic number, because the mean of its divisors is an integer number (1049834925).

Almost surely, 2^2099669849 is an apocalyptic number.

It is an amenable number.

2099669849 is a deficient number, since it is larger than the sum of its proper divisors (1).

2099669849 is an equidigital number, since it uses as much as digits as its factorization.

2099669849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15116544, while the sum is 62.

The square root of 2099669849 is about 45822.1545652319. The cubic root of 2099669849 is about 1280.5120528209.

The spelling of 2099669849 in words is "two billion, ninety-nine million, six hundred sixty-nine thousand, eight hundred forty-nine".