8439872113 has 4 divisors (see below), whose sum is σ = 8496515700. Its totient is φ = 8383228528.

The previous prime is 8439872081. The next prime is 8439872131. The reversal of 8439872113 is 3112789348.

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 4652331264 + 3787540849 = 68208^2 + 61543^2 .

It is a cyclic number.

It is not a de Polignac number, because 8439872113 - 2⁵ = 8439872081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8439872183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28321570 + ... + 28321867.

It is an arithmetic number, because the mean of its divisors is an integer number (2124128925).

Almost surely, 2^8439872113 is an apocalyptic number.

It is an amenable number.

8439872113 is a deficient number, since it is larger than the sum of its proper divisors (56643587).

8439872113 is a wasteful number, since it uses less digits than its factorization.

8439872113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56643586.

The product of its digits is 290304, while the sum is 46.

The square root of 8439872113 is about 91868.7765946625. The cubic root of 8439872113 is about 2036.0039769499.

The spelling of 8439872113 in words is "eight billion, four hundred thirty-nine million, eight hundred seventy-two thousand, one hundred thirteen".