9905996939 has 8 divisors (see below), whose sum is σ = 10247992608. Its totient is φ = 9567910080.

The previous prime is 9905996911. The next prime is 9905996999. The reversal of 9905996939 is 9396995099.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9905996939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9905996909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 972047 + ... + 982184.

It is an arithmetic number, because the mean of its divisors is an integer number (1280999076).

Almost surely, 2^9905996939 is an apocalyptic number.

9905996939 is a deficient number, since it is larger than the sum of its proper divisors (341995669).

9905996939 is a wasteful number, since it uses less digits than its factorization.

9905996939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1954405.

The product of its (nonzero) digits is 47829690, while the sum is 68.

The square root of 9905996939 is about 99528.8749007041. The cubic root of 9905996939 is about 2147.6626438733.

The spelling of 9905996939 in words is "nine billion, nine hundred five million, nine hundred ninety-six thousand, nine hundred thirty-nine".