844261129 has 2 divisors, whose sum is σ = 844261130. Its totient is φ = 844261128.

The previous prime is 844261127. The next prime is 844261163. The reversal of 844261129 is 921162448.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 434805904 + 409455225 = 20852^2 + 20235^2 .

It is a cyclic number.

It is not a de Polignac number, because 844261129 - 2¹ = 844261127 is a prime.

Together with 844261127, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (844261127) 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, 422130564 + 422130565.

It is an arithmetic number, because the mean of its divisors is an integer number (422130565).

Almost surely, 2^844261129 is an apocalyptic number.

It is an amenable number.

844261129 is a deficient number, since it is larger than the sum of its proper divisors (1).

844261129 is an equidigital number, since it uses as much as digits as its factorization.

844261129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 37.

The square root of 844261129 is about 29056.1719605319. The cubic root of 844261129 is about 945.1315584411.

The spelling of 844261129 in words is "eight hundred forty-four million, two hundred sixty-one thousand, one hundred twenty-nine".