98998889989 has 8 divisors (see below), whose sum is σ = 104828055768. Its totient is φ = 93170357760.

The previous prime is 98998889971. The next prime is 98998889999.

It is a happy number.

98998889989 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 52003153764 + 46995736225 = 228042^2 + 216785^2 .

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

It is not a de Polignac number, because 98998889989 - 2⁷ = 98998889861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 98998889897 and 98998889906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98998889999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184569 + ... + 481729.

It is an arithmetic number, because the mean of its divisors is an integer number (13103506971).

Almost surely, 2^98998889989 is an apocalyptic number.

It is an amenable number.

98998889989 is a deficient number, since it is larger than the sum of its proper divisors (5829165779).

98998889989 is a wasteful number, since it uses less digits than its factorization.

98998889989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316775.

The product of its digits is 17414258688, while the sum is 94.

The spelling of 98998889989 in words is "ninety-eight billion, nine hundred ninety-eight million, eight hundred eighty-nine thousand, nine hundred eighty-nine".