9938939 has 4 divisors (see below), whose sum is σ = 10011624. Its totient is φ = 9866256.

The previous prime is 9938927. The next prime is 9938953. The reversal of 9938939 is 9398399.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9398399 = 17 ⋅552847.

It is a cyclic number.

It is not a de Polignac number, because 9938939 - 2²⁰ = 8890363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9938959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36137 + ... + 36410.

It is an arithmetic number, because the mean of its divisors is an integer number (2502906).

Almost surely, 2^9938939 is an apocalyptic number.

9938939 is a deficient number, since it is larger than the sum of its proper divisors (72685).

9938939 is a wasteful number, since it uses less digits than its factorization.

9938939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72684.

The product of its digits is 472392, while the sum is 50.

The square root of 9938939 is about 3152.6082852140. The cubic root of 9938939 is about 215.0040669863.

The spelling of 9938939 in words is "nine million, nine hundred thirty-eight thousand, nine hundred thirty-nine".