9988976291 has 12 divisors (see below), whose sum is σ = 12125040912. Its totient is φ = 8189718768.

The previous prime is 9988976281. The next prime is 9988976299. The reversal of 9988976291 is 1926798899.

9988976291 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9988976291 - 2⁶ = 9988976227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9988976299) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4430540 + ... + 4432793.

It is an arithmetic number, because the mean of its divisors is an integer number (1010420076).

Almost surely, 2^9988976291 is an apocalyptic number.

9988976291 is a deficient number, since it is larger than the sum of its proper divisors (2136064621).

9988976291 is a wasteful number, since it uses less digits than its factorization.

9988976291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8863370 (or 8863363 counting only the distinct ones).

The product of its digits is 35271936, while the sum is 68.

The square root of 9988976291 is about 99944.8662563516. The cubic root of 9988976291 is about 2153.6427369158.

The spelling of 9988976291 in words is "nine billion, nine hundred eighty-eight million, nine hundred seventy-six thousand, two hundred ninety-one".