998888888867 has 4 divisors (see below), whose sum is σ = 999143516520. Its totient is φ = 998634261216.

The previous prime is 998888888863. The next prime is 998888888873. The reversal of 998888888867 is 768888888899.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 998888888867 - 2² = 998888888863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 998888888867.

It is not an unprimeable number, because it can be changed into a prime (998888888863) 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 in 3 ways as a sum of consecutive naturals, for example, 127307942 + ... + 127315787.

It is an arithmetic number, because the mean of its divisors is an integer number (249785879130).

Almost surely, 2^998888888867 is an apocalyptic number.

998888888867 is a deficient number, since it is larger than the sum of its proper divisors (254627653).

998888888867 is a wasteful number, since it uses less digits than its factorization.

998888888867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254627652.

The product of its digits is 57076088832, while the sum is 95.

The spelling of 998888888867 in words is "nine hundred ninety-eight billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred sixty-seven".