844668013 has 16 divisors (see below), whose sum is σ = 983093760. Its totient is φ = 710717616.

The previous prime is 844667981. The next prime is 844668029. The reversal of 844668013 is 310866448.

844668013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 844668013 - 2⁵ = 844667981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844668113) 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, 489370 + ... + 491092.

It is an arithmetic number, because the mean of its divisors is an integer number (61443360).

Almost surely, 2^844668013 is an apocalyptic number.

It is an amenable number.

844668013 is a deficient number, since it is larger than the sum of its proper divisors (138425747).

844668013 is a wasteful number, since it uses less digits than its factorization.

844668013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2976.

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 844668013 is about 29063.1727965135. The cubic root of 844668013 is about 945.2833665860.

The spelling of 844668013 in words is "eight hundred forty-four million, six hundred sixty-eight thousand, thirteen".