2809969841 has 4 divisors (see below), whose sum is σ = 3211394112. Its totient is φ = 2408545572.

The previous prime is 2809969837. The next prime is 2809969843. The reversal of 2809969841 is 1489699082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2809969841 - 2² = 2809969837 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2809969843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200712125 + ... + 200712138.

It is an arithmetic number, because the mean of its divisors is an integer number (802848528).

Almost surely, 2^2809969841 is an apocalyptic number.

It is an amenable number.

2809969841 is a deficient number, since it is larger than the sum of its proper divisors (401424271).

2809969841 is an equidigital number, since it uses as much as digits as its factorization.

2809969841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401424270.

The product of its (nonzero) digits is 2239488, while the sum is 56.

The square root of 2809969841 is about 53009.1486537937. The cubic root of 2809969841 is about 1411.1306326339.

The spelling of 2809969841 in words is "two billion, eight hundred nine million, nine hundred sixty-nine thousand, eight hundred forty-one".