9942379931 has 4 divisors (see below), whose sum is σ = 10846232664. Its totient is φ = 9038527200.

The previous prime is 9942379921. The next prime is 9942379933. The reversal of 9942379931 is 1399732499.

9942379931 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 9942379931 - 2¹⁰ = 9942378907 is a prime.

It is a super-2 number, since 2×9942379931² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9942379933) 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, 451926350 + ... + 451926371.

It is an arithmetic number, because the mean of its divisors is an integer number (2711558166).

Almost surely, 2^9942379931 is an apocalyptic number.

9942379931 is a deficient number, since it is larger than the sum of its proper divisors (903852733).

9942379931 is a wasteful number, since it uses less digits than its factorization.

9942379931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903852732.

The product of its digits is 3306744, while the sum is 56.

The square root of 9942379931 is about 99711.4834459903. The cubic root of 9942379931 is about 2150.2887609992.

The spelling of 9942379931 in words is "nine billion, nine hundred forty-two million, three hundred seventy-nine thousand, nine hundred thirty-one".