844808849 has 2 divisors, whose sum is σ = 844808850. Its totient is φ = 844808848.

The previous prime is 844808821. The next prime is 844808873. The reversal of 844808849 is 948808448.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 601230400 + 243578449 = 24520^2 + 15607^2 .

It is a cyclic number.

It is not a de Polignac number, because 844808849 - 2⁸ = 844808593 is a prime.

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 844808849.

It is not a weakly prime, because it can be changed into another prime (844808449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422404424 + 422404425.

It is an arithmetic number, because the mean of its divisors is an integer number (422404425).

Almost surely, 2^844808849 is an apocalyptic number.

It is an amenable number.

844808849 is a deficient number, since it is larger than the sum of its proper divisors (1).

844808849 is an equidigital number, since it uses as much as digits as its factorization.

844808849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2359296, while the sum is 53.

The square root of 844808849 is about 29065.5956243804. The cubic root of 844808849 is about 945.3359010444.

The spelling of 844808849 in words is "eight hundred forty-four million, eight hundred eight thousand, eight hundred forty-nine".