9987887899 has 8 divisors (see below), whose sum is σ = 10943460720. Its totient is φ = 9040245600.

The previous prime is 9987887873. The next prime is 9987887911.

9987887899 is nontrivially palindromic in base 10.

9987887899 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 9987887899 - 2⁹ = 9987887387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9987887699) 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, 1979992 + ... + 1985029.

It is an arithmetic number, because the mean of its divisors is an integer number (1367932590).

Almost surely, 2^9987887899 is an apocalyptic number.

9987887899 is a deficient number, since it is larger than the sum of its proper divisors (955572821).

9987887899 is a wasteful number, since it uses less digits than its factorization.

9987887899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3965261.

The product of its digits is 1316818944, while the sum is 82.

The square root of 9987887899 is about 99939.4211460122. The cubic root of 9987887899 is about 2153.5645142633.

The spelling of 9987887899 in words is "nine billion, nine hundred eighty-seven million, eight hundred eighty-seven thousand, eight hundred ninety-nine".