998888899 has 4 divisors (see below), whose sum is σ = 998969464. Its totient is φ = 998808336.

The previous prime is 998888897. The next prime is 998888903.

It is a happy number.

998888899 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 998888899 - 2¹ = 998888897 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (998888897) 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 3 ways as a sum of consecutive naturals, for example, 17322 + ... + 47935.

It is an arithmetic number, because the mean of its divisors is an integer number (249742366).

Almost surely, 2^998888899 is an apocalyptic number.

998888899 is a deficient number, since it is larger than the sum of its proper divisors (80565).

998888899 is a wasteful number, since it uses less digits than its factorization.

998888899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80564.

The product of its digits is 214990848, while the sum is 76.

The square root of 998888899 is about 31605.2036696491. The cubic root of 998888899 is about 999.6294957435.

The spelling of 998888899 in words is "nine hundred ninety-eight million, eight hundred eighty-eight thousand, eight hundred ninety-nine".