2805766349 has 2 divisors, whose sum is σ = 2805766350. Its totient is φ = 2805766348.

The previous prime is 2805766339. The next prime is 2805766361. The reversal of 2805766349 is 9436675082.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2804443849 + 1322500 = 52957^2 + 1150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2805766349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2805766297 and 2805766306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2805766339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1402883174 + 1402883175.

It is an arithmetic number, because the mean of its divisors is an integer number (1402883175).

Almost surely, 2^2805766349 is an apocalyptic number.

It is an amenable number.

2805766349 is a deficient number, since it is larger than the sum of its proper divisors (1).

2805766349 is an equidigital number, since it uses as much as digits as its factorization.

2805766349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The square root of 2805766349 is about 52969.4850739556. The cubic root of 2805766349 is about 1410.4266349762.

The spelling of 2805766349 in words is "two billion, eight hundred five million, seven hundred sixty-six thousand, three hundred forty-nine".