844806889 has 4 divisors (see below), whose sum is σ = 846176724. Its totient is φ = 843437056.

The previous prime is 844806883. The next prime is 844806901. The reversal of 844806889 is 988608448.

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

It can be written as a sum of positive squares in 2 ways, for example, as 89491600 + 755315289 = 9460^2 + 27483^2 .

It is a cyclic number.

It is not a de Polignac number, because 844806889 - 2¹⁹ = 844282601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (844806883) 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, 683992 + ... + 685225.

It is an arithmetic number, because the mean of its divisors is an integer number (211544181).

Almost surely, 2^844806889 is an apocalyptic number.

It is an amenable number.

844806889 is a deficient number, since it is larger than the sum of its proper divisors (1369835).

844806889 is a wasteful number, since it uses less digits than its factorization.

844806889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369834.

The product of its (nonzero) digits is 3538944, while the sum is 55.

The square root of 844806889 is about 29065.5619075221. The cubic root of 844806889 is about 945.3351699678.

The spelling of 844806889 in words is "eight hundred forty-four million, eight hundred six thousand, eight hundred eighty-nine".