9909938747 has 4 divisors (see below), whose sum is σ = 9911544096. Its totient is φ = 9908333400.

The previous prime is 9909938693. The next prime is 9909938827. The reversal of 9909938747 is 7478399099.

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 9909938747 - 2¹² = 9909934651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9909938047) 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 3 ways as a sum of consecutive naturals, for example, 793379 + ... + 805772.

It is an arithmetic number, because the mean of its divisors is an integer number (2477886024).

Almost surely, 2^9909938747 is an apocalyptic number.

9909938747 is a deficient number, since it is larger than the sum of its proper divisors (1605349).

9909938747 is a wasteful number, since it uses less digits than its factorization.

9909938747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605348.

The product of its (nonzero) digits is 30862944, while the sum is 65.

The square root of 9909938747 is about 99548.6752649175. The cubic root of 9909938747 is about 2147.9474730597.

The spelling of 9909938747 in words is "nine billion, nine hundred nine million, nine hundred thirty-eight thousand, seven hundred forty-seven".