9938839 has 4 divisors (see below), whose sum is σ = 10014840. Its totient is φ = 9862840.

The previous prime is 9938833. The next prime is 9938849. The reversal of 9938839 is 9388399.

9938839 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 9938839 - 2⁵ = 9938807 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9938792 and 9938801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9938833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37804 + ... + 38065.

It is an arithmetic number, because the mean of its divisors is an integer number (2503710).

Almost surely, 2^9938839 is an apocalyptic number.

9938839 is a deficient number, since it is larger than the sum of its proper divisors (76001).

9938839 is a wasteful number, since it uses less digits than its factorization.

9938839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76000.

The product of its digits is 419904, while the sum is 49.

The square root of 9938839 is about 3152.5924252907. The cubic root of 9938839 is about 215.0033459007.

The spelling of 9938839 in words is "nine million, nine hundred thirty-eight thousand, eight hundred thirty-nine".