844340939 has 4 divisors (see below), whose sum is σ = 909290256. Its totient is φ = 779391624.

The previous prime is 844340897. The next prime is 844340951. The reversal of 844340939 is 939043448.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 844340939 - 2²⁸ = 575905483 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 844340939.

It is not an unprimeable number, because it can be changed into a prime (844340239) 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 in 3 ways as a sum of consecutive naturals, for example, 32474639 + ... + 32474664.

It is an arithmetic number, because the mean of its divisors is an integer number (227322564).

Almost surely, 2^844340939 is an apocalyptic number.

844340939 is a deficient number, since it is larger than the sum of its proper divisors (64949317).

844340939 is a wasteful number, since it uses less digits than its factorization.

844340939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64949316.

The product of its (nonzero) digits is 373248, while the sum is 44.

The square root of 844340939 is about 29057.5453023823. The cubic root of 844340939 is about 945.1613393427.

It can be divided in two parts, 8443409 and 39, that added together give a palindrome (8443448).

The spelling of 844340939 in words is "eight hundred forty-four million, three hundred forty thousand, nine hundred thirty-nine".