9945938839 has 8 divisors (see below), whose sum is σ = 10045092512. Its totient is φ = 9846835200.

The previous prime is 9945938813. The next prime is 9945938857. The reversal of 9945938839 is 9388395499.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9945938839 - 2¹⁵ = 9945906071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9945938869) 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 7 ways as a sum of consecutive naturals, for example, 484447 + ... + 504559.

It is an arithmetic number, because the mean of its divisors is an integer number (1255636564).

Almost surely, 2^9945938839 is an apocalyptic number.

9945938839 is a deficient number, since it is larger than the sum of its proper divisors (99153673).

9945938839 is a wasteful number, since it uses less digits than its factorization.

9945938839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25017.

The product of its digits is 75582720, while the sum is 67.

The square root of 9945938839 is about 99729.3278780119. The cubic root of 9945938839 is about 2150.5452980660.

The spelling of 9945938839 in words is "nine billion, nine hundred forty-five million, nine hundred thirty-eight thousand, eight hundred thirty-nine".