111727987 has 6 divisors (see below), whose sum is σ = 129969348. Its totient is φ = 95766804.

The previous prime is 111727921. The next prime is 111727991. The reversal of 111727987 is 789727111.

It is a de Polignac number, because none of the positive numbers 2^k-111727987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111727907) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1140033 + ... + 1140130.

It is an arithmetic number, because the mean of its divisors is an integer number (21661558).

Almost surely, 2^111727987 is an apocalyptic number.

111727987 is a deficient number, since it is larger than the sum of its proper divisors (18241361).

111727987 is an equidigital number, since it uses as much as digits as its factorization.

111727987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280177 (or 2280170 counting only the distinct ones).

The product of its digits is 49392, while the sum is 43.

The square root of 111727987 is about 10570.1460254814. The cubic root of 111727987 is about 481.6379043314.

The spelling of 111727987 in words is "one hundred eleven million, seven hundred twenty-seven thousand, nine hundred eighty-seven".