111988411 has 2 divisors, whose sum is σ = 111988412. Its totient is φ = 111988410.

The previous prime is 111988397. The next prime is 111988427. The reversal of 111988411 is 114889111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111988411 - 2⁵ = 111988379 is a prime.

It is not a weakly prime, because it can be changed into another prime (111988511) 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 as a sum of consecutive naturals, namely, 55994205 + 55994206.

It is an arithmetic number, because the mean of its divisors is an integer number (55994206).

Almost surely, 2^111988411 is an apocalyptic number.

111988411 is a deficient number, since it is larger than the sum of its proper divisors (1).

111988411 is an equidigital number, since it uses as much as digits as its factorization.

111988411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 34.

The square root of 111988411 is about 10582.4577013093. The cubic root of 111988411 is about 482.0118265838.

The spelling of 111988411 in words is "one hundred eleven million, nine hundred eighty-eight thousand, four hundred eleven".