999998888899 has 2 divisors, whose sum is σ = 999998888900. Its totient is φ = 999998888898.

The previous prime is 999998888881. The next prime is 999998888953. The reversal of 999998888899 is 998888899999.

It is a weak prime.

It is an emirp because it is prime and its reverse (998888899999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999998888899 - 2⁹ = 999998888387 is a prime.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 999998888798 and 999998888807.

It is not a weakly prime, because it can be changed into another prime (999998882899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999444449 + 499999444450.

It is an arithmetic number, because the mean of its divisors is an integer number (499999444450).

Almost surely, 2^999998888899 is an apocalyptic number.

999998888899 is a deficient number, since it is larger than the sum of its proper divisors (1).

999998888899 is an equidigital number, since it uses as much as digits as its factorization.

999998888899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 156728328192, while the sum is 103.

It can be divided in two parts, 99999 and 8888899, that added together give a palindrome (8988898).

The spelling of 999998888899 in words is "nine hundred ninety-nine billion, nine hundred ninety-eight million, eight hundred eighty-eight thousand, eight hundred ninety-nine".