1988199099 has 12 divisors (see below), whose sum is σ = 2872334400. Its totient is φ = 1325239344.

The previous prime is 1988199077. The next prime is 1988199137. The reversal of 1988199099 is 9909918891.

It is not a de Polignac number, because 1988199099 - 2⁵ = 1988199067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1988199599) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49782 + ... + 80340.

It is an arithmetic number, because the mean of its divisors is an integer number (239361200).

Almost surely, 2^1988199099 is an apocalyptic number.

1988199099 is a deficient number, since it is larger than the sum of its proper divisors (884135301).

1988199099 is a wasteful number, since it uses less digits than its factorization.

1988199099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37794 (or 37791 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 63.

The square root of 1988199099 is about 44589.2262659939. The cubic root of 1988199099 is about 1257.4381260867.

The spelling of 1988199099 in words is "one billion, nine hundred eighty-eight million, one hundred ninety-nine thousand, ninety-nine".