844755139 has 2 divisors, whose sum is σ = 844755140. Its totient is φ = 844755138.

The previous prime is 844755127. The next prime is 844755151. The reversal of 844755139 is 931557448.

844755139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (844755127) and next prime (844755151).

It is a cyclic number.

It is not a de Polignac number, because 844755139 - 2¹⁹ = 844230851 is a prime.

It is a super-2 number, since 2×844755139² = 1427222489733818642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (844755179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422377569 + 422377570.

It is an arithmetic number, because the mean of its divisors is an integer number (422377570).

Almost surely, 2^844755139 is an apocalyptic number.

844755139 is a deficient number, since it is larger than the sum of its proper divisors (1).

844755139 is an equidigital number, since it uses as much as digits as its factorization.

844755139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 46.

The square root of 844755139 is about 29064.6716650989. The cubic root of 844755139 is about 945.3158669000.

The spelling of 844755139 in words is "eight hundred forty-four million, seven hundred fifty-five thousand, one hundred thirty-nine".