2806843409 has 2 divisors, whose sum is σ = 2806843410. Its totient is φ = 2806843408.

The previous prime is 2806843399. The next prime is 2806843411. The reversal of 2806843409 is 9043486082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2371203025 + 435640384 = 48695^2 + 20872^2 .

It is a cyclic number.

It is not a de Polignac number, because 2806843409 - 2²⁸ = 2538407953 is a prime.

Together with 2806843411, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2806843409.

It is not a weakly prime, because it can be changed into another prime (2806843469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1403421704 + 1403421705.

It is an arithmetic number, because the mean of its divisors is an integer number (1403421705).

Almost surely, 2^2806843409 is an apocalyptic number.

It is an amenable number.

2806843409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2806843409 is an equidigital number, since it uses as much as digits as its factorization.

2806843409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 331776, while the sum is 44.

The square root of 2806843409 is about 52979.6508954146. The cubic root of 2806843409 is about 1410.6070871334.

The spelling of 2806843409 in words is "two billion, eight hundred six million, eight hundred forty-three thousand, four hundred nine".