2099449659 has 4 divisors (see below), whose sum is σ = 2799266216. Its totient is φ = 1399633104.

The previous prime is 2099449643. The next prime is 2099449661. The reversal of 2099449659 is 9569449902.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2099449659 - 2⁴ = 2099449643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2099449599 and 2099449608.

It is not an unprimeable number, because it can be changed into a prime (2099449619) 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, 349908274 + ... + 349908279.

It is an arithmetic number, because the mean of its divisors is an integer number (699816554).

Almost surely, 2^2099449659 is an apocalyptic number.

2099449659 is a deficient number, since it is larger than the sum of its proper divisors (699816557).

2099449659 is an equidigital number, since it uses as much as digits as its factorization.

2099449659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699816556.

The product of its (nonzero) digits is 6298560, while the sum is 57.

The square root of 2099449659 is about 45819.7518435009. The cubic root of 2099449659 is about 1280.4672893063.

The spelling of 2099449659 in words is "two billion, ninety-nine million, four hundred forty-nine thousand, six hundred fifty-nine".