1189118998 has 12 divisors (see below), whose sum is σ = 1864603188. Its totient is φ = 568708580.

The previous prime is 1189118969. The next prime is 1189118999. The reversal of 1189118998 is 8998119811.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189118999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 560908 + ... + 563023.

It is an arithmetic number, because the mean of its divisors is an integer number (155383599).

Almost surely, 2^1189118998 is an apocalyptic number.

1189118998 is a deficient number, since it is larger than the sum of its proper divisors (675484190).

1189118998 is a wasteful number, since it uses less digits than its factorization.

1189118998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123979 (or 1123956 counting only the distinct ones).

The product of its digits is 373248, while the sum is 55.

The square root of 1189118998 is about 34483.6047709633. The cubic root of 1189118998 is about 1059.4369259380.

The spelling of 1189118998 in words is "one billion, one hundred eighty-nine million, one hundred eighteen thousand, nine hundred ninety-eight".