844421109 has 16 divisors (see below), whose sum is σ = 1307832960. Its totient is φ = 474615360.

The previous prime is 844421099. The next prime is 844421111. The reversal of 844421109 is 901124448.

It is not a de Polignac number, because 844421109 - 2⁵ = 844421077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 844421109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844421119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 328314 + ... + 330875.

It is an arithmetic number, because the mean of its divisors is an integer number (81739560).

Almost surely, 2^844421109 is an apocalyptic number.

It is an amenable number.

844421109 is a deficient number, since it is larger than the sum of its proper divisors (463411851).

844421109 is a wasteful number, since it uses less digits than its factorization.

844421109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659260.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 844421109 is about 29058.9247736388. The cubic root of 844421109 is about 945.1912526882.

The spelling of 844421109 in words is "eight hundred forty-four million, four hundred twenty-one thousand, one hundred nine".