844447047889 has 2 divisors, whose sum is σ = 844447047890. Its totient is φ = 844447047888.

The previous prime is 844447047841. The next prime is 844447047923. The reversal of 844447047889 is 988740744448.

844447047889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 472326307600 + 372120740289 = 687260^2 + 610017^2 .

It is a cyclic number.

It is not a de Polignac number, because 844447047889 - 2²⁵ = 844413493457 is a prime.

It is not a weakly prime, because it can be changed into another prime (844447047809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422223523944 + 422223523945.

It is an arithmetic number, because the mean of its divisors is an integer number (422223523945).

Almost surely, 2^844447047889 is an apocalyptic number.

It is an amenable number.

844447047889 is a deficient number, since it is larger than the sum of its proper divisors (1).

844447047889 is an equidigital number, since it uses as much as digits as its factorization.

844447047889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 231211008, while the sum is 67.

The spelling of 844447047889 in words is "eight hundred forty-four billion, four hundred forty-seven million, forty-seven thousand, eight hundred eighty-nine".