99998111 has 2 divisors, whose sum is σ = 99998112. Its totient is φ = 99998110.

The previous prime is 99998099. The next prime is 99998147. The reversal of 99998111 is 11189999.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99998111 is a prime.

It is a Chen prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99998191) 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, 49999055 + 49999056.

It is an arithmetic number, because the mean of its divisors is an integer number (49999056).

Almost surely, 2^99998111 is an apocalyptic number.

99998111 is a deficient number, since it is larger than the sum of its proper divisors (1).

99998111 is an equidigital number, since it uses as much as digits as its factorization.

99998111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 47.

The square root of 99998111 is about 9999.9055495540. The cubic root of 99998111 is about 464.1559606891.

The spelling of 99998111 in words is "ninety-nine million, nine hundred ninety-eight thousand, one hundred eleven".