1117181998 has 16 divisors (see below), whose sum is σ = 1683269280. Its totient is φ = 556098336.

The previous prime is 1117181977. The next prime is 1117182041. The reversal of 1117181998 is 8991817111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 593623 + ... + 595501.

It is an arithmetic number, because the mean of its divisors is an integer number (105204330).

Almost surely, 2^1117181998 is an apocalyptic number.

1117181998 is a deficient number, since it is larger than the sum of its proper divisors (566087282).

1117181998 is a wasteful number, since it uses less digits than its factorization.

1117181998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3051.

The product of its digits is 36288, while the sum is 46.

The square root of 1117181998 is about 33424.2725874476. The cubic root of 1117181998 is about 1037.6271091762.

The spelling of 1117181998 in words is "one billion, one hundred seventeen million, one hundred eighty-one thousand, nine hundred ninety-eight".