9909042747 has 8 divisors (see below), whose sum is σ = 13212541440. Its totient is φ = 6605786280.

The previous prime is 9909042733. The next prime is 9909042761. The reversal of 9909042747 is 7472409099.

It is an interprime number because it is at equal distance from previous prime (9909042733) and next prime (9909042761).

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

It is not a de Polignac number, because 9909042747 - 2¹⁴ = 9909026363 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9909042747.

It is not an unprimeable number, because it can be changed into a prime (9909042727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84622 + ... + 164252.

It is an arithmetic number, because the mean of its divisors is an integer number (1651567680).

Almost surely, 2^9909042747 is an apocalyptic number.

9909042747 is a deficient number, since it is larger than the sum of its proper divisors (3303498693).

9909042747 is a wasteful number, since it uses less digits than its factorization.

9909042747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121113.

The product of its (nonzero) digits is 1143072, while the sum is 51.

The square root of 9909042747 is about 99544.1748521730. The cubic root of 9909042747 is about 2147.8827360655.

The spelling of 9909042747 in words is "nine billion, nine hundred nine million, forty-two thousand, seven hundred forty-seven".