1188113879 has 4 divisors (see below), whose sum is σ = 1210531176. Its totient is φ = 1165696584.

The previous prime is 1188113873. The next prime is 1188113903. The reversal of 1188113879 is 9783118811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1188113879 - 2²⁰ = 1187065303 is a prime.

It is a super-2 number, since 2×1188113879² = 2823229178944853282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1188113873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11208569 + ... + 11208674.

It is an arithmetic number, because the mean of its divisors is an integer number (302632794).

Almost surely, 2^1188113879 is an apocalyptic number.

1188113879 is a deficient number, since it is larger than the sum of its proper divisors (22417297).

1188113879 is an equidigital number, since it uses as much as digits as its factorization.

1188113879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22417296.

The product of its digits is 96768, while the sum is 47.

The square root of 1188113879 is about 34469.0278220898. The cubic root of 1188113879 is about 1059.1383406393.

The spelling of 1188113879 in words is "one billion, one hundred eighty-eight million, one hundred thirteen thousand, eight hundred seventy-nine".