9938318209 has 4 divisors (see below), whose sum is σ = 9948072240. Its totient is φ = 9928564180.

The previous prime is 9938318207. The next prime is 9938318297. The reversal of 9938318209 is 9028138399.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9938318209 - 2¹ = 9938318207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9938318207) 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, 4875487 + ... + 4877524.

It is an arithmetic number, because the mean of its divisors is an integer number (2487018060).

Almost surely, 2^9938318209 is an apocalyptic number.

It is an amenable number.

9938318209 is a deficient number, since it is larger than the sum of its proper divisors (9754031).

9938318209 is a wasteful number, since it uses less digits than its factorization.

9938318209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9754030.

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 9938318209 is about 99691.1139921708. The cubic root of 9938318209 is about 2149.9959047335.

The spelling of 9938318209 in words is "nine billion, nine hundred thirty-eight million, three hundred eighteen thousand, two hundred nine".