1117991198 has 16 divisors (see below), whose sum is σ = 1808306640. Its totient is φ = 516657600.

The previous prime is 1117991183. The next prime is 1117991233. The reversal of 1117991198 is 8911997111.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357233 + ... + 360348.

It is an arithmetic number, because the mean of its divisors is an integer number (113019165).

Almost surely, 2^1117991198 is an apocalyptic number.

1117991198 is a deficient number, since it is larger than the sum of its proper divisors (690315442).

1117991198 is a wasteful number, since it uses less digits than its factorization.

1117991198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717643.

The product of its digits is 40824, while the sum is 47.

The square root of 1117991198 is about 33436.3753717415. The cubic root of 1117991198 is about 1037.8775742495.

The spelling of 1117991198 in words is "one billion, one hundred seventeen million, nine hundred ninety-one thousand, one hundred ninety-eight".