9789913839 has 16 divisors (see below), whose sum is σ = 13256714240. Its totient is φ = 6424989120.

The previous prime is 9789913829. The next prime is 9789913901. The reversal of 9789913839 is 9383199879.

It is not a de Polignac number, because 9789913839 - 2¹² = 9789909743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9789913839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9789913829) 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 15 ways as a sum of consecutive naturals, for example, 308274 + ... + 338544.

It is an arithmetic number, because the mean of its divisors is an integer number (828544640).

Almost surely, 2^9789913839 is an apocalyptic number.

9789913839 is a deficient number, since it is larger than the sum of its proper divisors (3466800401).

9789913839 is a wasteful number, since it uses less digits than its factorization.

9789913839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31950.

The product of its digits is 26453952, while the sum is 66.

The square root of 9789913839 is about 98943.9934457873. The cubic root of 9789913839 is about 2139.2405549728.

The spelling of 9789913839 in words is "nine billion, seven hundred eighty-nine million, nine hundred thirteen thousand, eight hundred thirty-nine".