9899999989 has 32 divisors (see below), whose sum is σ = 11512512000. Its totient is φ = 8418945600.

The previous prime is 9899999987. The next prime is 9900000001.

9899999989 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9899999989 - 2¹ = 9899999987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9899999987) 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, 6269002 + ... + 6270580.

It is an arithmetic number, because the mean of its divisors is an integer number (359766000).

Almost surely, 2^9899999989 is an apocalyptic number.

It is an amenable number.

9899999989 is a deficient number, since it is larger than the sum of its proper divisors (1612512011).

9899999989 is a wasteful number, since it uses less digits than its factorization.

9899999989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969.

The product of its digits is 2754990144, while the sum is 88.

The square root of 9899999989 is about 99498.7436553849. The cubic root of 9899999989 is about 2147.2291682237.

It can be divided in two parts, 9 and 899999989, that added together give a palindrome (899999998).

The spelling of 9899999989 in words is "nine billion, eight hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred eighty-nine".