111117889 has 2 divisors, whose sum is σ = 111117890. Its totient is φ = 111117888.

The previous prime is 111117883. The next prime is 111117901. The reversal of 111117889 is 988711111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81306289 + 29811600 = 9017^2 + 5460^2 .

It is a cyclic number.

It is not a de Polignac number, because 111117889 - 2¹¹ = 111115841 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (111117883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55558944 + 55558945.

It is an arithmetic number, because the mean of its divisors is an integer number (55558945).

Almost surely, 2^111117889 is an apocalyptic number.

It is an amenable number.

111117889 is a deficient number, since it is larger than the sum of its proper divisors (1).

111117889 is an equidigital number, since it uses as much as digits as its factorization.

111117889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 37.

The square root of 111117889 is about 10541.2470324910. The cubic root of 111117889 is about 480.7596319777.

The spelling of 111117889 in words is "one hundred eleven million, one hundred seventeen thousand, eight hundred eighty-nine".