844091 has 4 divisors (see below), whose sum is σ = 846384. Its totient is φ = 841800.

The previous prime is 844087. The next prime is 844093. The reversal of 844091 is 190448.

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 844091 - 2² = 844087 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 844091.

It is not an unprimeable number, because it can be changed into a prime (844093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455 + ... + 1376.

It is an arithmetic number, because the mean of its divisors is an integer number (211596).

2⁸⁴⁴⁰⁹¹ is an apocalyptic number.

844091 is a deficient number, since it is larger than the sum of its proper divisors (2293).

844091 is a wasteful number, since it uses less digits than its factorization.

844091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 844091 is about 918.7442516827. The cubic root of 844091 is about 94.5068068966.

The spelling of 844091 in words is "eight hundred forty-four thousand, ninety-one".