2099659889 has 4 divisors (see below), whose sum is σ = 2099759220. Its totient is φ = 2099560560.

The previous prime is 2099659883. The next prime is 2099659901. The reversal of 2099659889 is 9889569902.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 462400 + 2099197489 = 680^2 + 45817^2 .

It is a cyclic number.

It is not a de Polignac number, because 2099659889 - 2⁸ = 2099659633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2099659883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3902 + ... + 64919.

It is an arithmetic number, because the mean of its divisors is an integer number (524939805).

Almost surely, 2^2099659889 is an apocalyptic number.

It is an amenable number.

2099659889 is a deficient number, since it is larger than the sum of its proper divisors (99331).

2099659889 is an equidigital number, since it uses as much as digits as its factorization.

2099659889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99330.

The product of its (nonzero) digits is 25194240, while the sum is 65.

The square root of 2099659889 is about 45822.0458840502. The cubic root of 2099659889 is about 1280.5100280708.

The spelling of 2099659889 in words is "two billion, ninety-nine million, six hundred fifty-nine thousand, eight hundred eighty-nine".