9979443836 has 24 divisors (see below), whose sum is σ = 18559590336. Its totient is φ = 4678871040.

The previous prime is 9979443809. The next prime is 9979443907. The reversal of 9979443836 is 6383449799.

9979443836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 252341 + ... + 289196.

It is an arithmetic number, because the mean of its divisors is an integer number (773316264).

Almost surely, 2^9979443836 is an apocalyptic number.

It is an amenable number.

9979443836 is a deficient number, since it is larger than the sum of its proper divisors (8580146500).

9979443836 is a wasteful number, since it uses less digits than its factorization.

9979443836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541829 (or 541827 counting only the distinct ones).

The product of its digits is 35271936, while the sum is 62.

The square root of 9979443836 is about 99897.1663061571. The cubic root of 9979443836 is about 2152.9574469268.

The spelling of 9979443836 in words is "nine billion, nine hundred seventy-nine million, four hundred forty-three thousand, eight hundred thirty-six".