1111199998 has 4 divisors (see below), whose sum is σ = 1666800000. Its totient is φ = 555599998.

The previous prime is 1111199987. The next prime is 1111200001. The reversal of 1111199998 is 8999911111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8999911111 = 811 ⋅11097301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277799998 + ... + 277800001.

It is an arithmetic number, because the mean of its divisors is an integer number (416700000).

Almost surely, 2^1111199998 is an apocalyptic number.

1111199998 is a deficient number, since it is larger than the sum of its proper divisors (555600002).

1111199998 is an equidigital number, since it uses as much as digits as its factorization.

1111199998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555600001.

The product of its digits is 52488, while the sum is 49.

The square root of 1111199998 is about 33334.6666100023. Note that the first 4 decimals coincide. The cubic root of 1111199998 is about 1035.7717871379.

The spelling of 1111199998 in words is "one billion, one hundred eleven million, one hundred ninety-nine thousand, nine hundred ninety-eight".