111117887 has 4 divisors (see below), whose sum is σ = 111244896. Its totient is φ = 110990880.

The previous prime is 111117883. The next prime is 111117889. The reversal of 111117887 is 788711111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 788711111 = 373 ⋅2114507.

It is a cyclic number.

It is not a de Polignac number, because 111117887 - 2² = 111117883 is a prime.

It is a super-2 number, since 2×111117887² = 24694369622689538, 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 (111117883) 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, 62183 + ... + 63944.

It is an arithmetic number, because the mean of its divisors is an integer number (27811224).

Almost surely, 2^111117887 is an apocalyptic number.

111117887 is a deficient number, since it is larger than the sum of its proper divisors (127009).

111117887 is an equidigital number, since it uses as much as digits as its factorization.

111117887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127008.

The product of its digits is 3136, while the sum is 35.

The square root of 111117887 is about 10541.2469376255. The cubic root of 111117887 is about 480.7596290933.

Adding to 111117887 its reverse (788711111), we get a palindrome (899828998).

The spelling of 111117887 in words is "one hundred eleven million, one hundred seventeen thousand, eight hundred eighty-seven".