98999111 has 2 divisors, whose sum is σ = 98999112. Its totient is φ = 98999110.

The previous prime is 98999099. The next prime is 98999113. The reversal of 98999111 is 11199989.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (11199989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98999111 - 2¹⁰ = 98998087 is a prime.

Together with 98999113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98999113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49499555 + 49499556.

It is an arithmetic number, because the mean of its divisors is an integer number (49499556).

Almost surely, 2^98999111 is an apocalyptic number.

98999111 is a deficient number, since it is larger than the sum of its proper divisors (1).

98999111 is an equidigital number, since it uses as much as digits as its factorization.

98999111 is an evil number, because the sum of its binary digits is even.

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

The square root of 98999111 is about 9949.8296970350. The cubic root of 98999111 is about 462.6051162098.

The spelling of 98999111 in words is "ninety-eight million, nine hundred ninety-nine thousand, one hundred eleven".