9994789939 has 4 divisors (see below), whose sum is σ = 9998710480. Its totient is φ = 9990869400.

The previous prime is 9994789907. The next prime is 9994789943. The reversal of 9994789939 is 9399874999.

9994789939 is digitally balanced in base 2, 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 9994789939 - 2⁵ = 9994789907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9994786939) 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, 1956444 + ... + 1961545.

It is an arithmetic number, because the mean of its divisors is an integer number (2499677620).

Almost surely, 2^9994789939 is an apocalyptic number.

9994789939 is a deficient number, since it is larger than the sum of its proper divisors (3920541).

9994789939 is a wasteful number, since it uses less digits than its factorization.

9994789939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3920540.

The product of its digits is 357128352, while the sum is 76.

The square root of 9994789939 is about 99973.9463010238. The cubic root of 9994789939 is about 2154.0604671617.

The spelling of 9994789939 in words is "nine billion, nine hundred ninety-four million, seven hundred eighty-nine thousand, nine hundred thirty-nine".