111789311927 has 4 divisors (see below), whose sum is σ = 111797487216. Its totient is φ = 111781136640.

The previous prime is 111789311839. The next prime is 111789311957. The reversal of 111789311927 is 729113987111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 729113987111 = 138493 ⋅5264627.

It is a cyclic number.

It is not a de Polignac number, because 111789311927 - 2²² = 111785117623 is a prime.

It is a super-2 number, since 2×111789311927² (a number of 23 digits) 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 (111789311957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4067099 + ... + 4094492.

It is an arithmetic number, because the mean of its divisors is an integer number (27949371804).

Almost surely, 2^111789311927 is an apocalyptic number.

111789311927 is a deficient number, since it is larger than the sum of its proper divisors (8175289).

111789311927 is an equidigital number, since it uses as much as digits as its factorization.

111789311927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8175288.

The product of its digits is 190512, while the sum is 50.

The spelling of 111789311927 in words is "one hundred eleven billion, seven hundred eighty-nine million, three hundred eleven thousand, nine hundred twenty-seven".