9898787899 has 32 divisors (see below), whose sum is σ = 13541520384. Its totient is φ = 6985630080.

The previous prime is 9898787807. The next prime is 9898787981. The reversal of 9898787899 is 9987878989.

It is not a de Polignac number, because 9898787899 - 2¹³ = 9898779707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9898787099) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40239 + ... + 146344.

It is an arithmetic number, because the mean of its divisors is an integer number (423172512).

Almost surely, 2^9898787899 is an apocalyptic number.

9898787899 is a deficient number, since it is larger than the sum of its proper divisors (3642732485).

9898787899 is a wasteful number, since it uses less digits than its factorization.

9898787899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186667.

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

The square root of 9898787899 is about 99492.6524875078. The cubic root of 9898787899 is about 2147.1415338389.

It can be divided in two parts, 9898 and 787899, that added together give a palindrome (797797).

The spelling of 9898787899 in words is "nine billion, eight hundred ninety-eight million, seven hundred eighty-seven thousand, eight hundred ninety-nine".