9899559989 has 4 divisors (see below), whose sum is σ = 10799520000. Its totient is φ = 8999599980.

The previous prime is 9899559983. The next prime is 9899559991.

9899559989 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9899559989 - 2¹⁶ = 9899494453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9899559983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449979989 + ... + 449980010.

It is an arithmetic number, because the mean of its divisors is an integer number (2699880000).

Almost surely, 2^9899559989 is an apocalyptic number.

It is an amenable number.

9899559989 is a deficient number, since it is larger than the sum of its proper divisors (899960011).

9899559989 is a wasteful number, since it uses less digits than its factorization.

9899559989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899960010.

The product of its digits is 850305600, while the sum is 80.

The square root of 9899559989 is about 99496.5325476220. The cubic root of 9899559989 is about 2147.1973569499.

The spelling of 9899559989 in words is "nine billion, eight hundred ninety-nine million, five hundred fifty-nine thousand, nine hundred eighty-nine".