999998811199 has 2 divisors, whose sum is σ = 999998811200. Its totient is φ = 999998811198.

The previous prime is 999998811191. The next prime is 999998811221. The reversal of 999998811199 is 991118899999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999998811199 - 2³ = 999998811191 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999998811191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999405599 + 499999405600.

It is an arithmetic number, because the mean of its divisors is an integer number (499999405600).

Almost surely, 2^999998811199 is an apocalyptic number.

999998811199 is a deficient number, since it is larger than the sum of its proper divisors (1).

999998811199 is an equidigital number, since it uses as much as digits as its factorization.

999998811199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 306110016, while the sum is 82.

It can be divided in two parts, 99999 and 8811199, that added together give a palindrome (8911198).

The spelling of 999998811199 in words is "nine hundred ninety-nine billion, nine hundred ninety-eight million, eight hundred eleven thousand, one hundred ninety-nine".