111988427 has 2 divisors, whose sum is σ = 111988428. Its totient is φ = 111988426.

The previous prime is 111988411. The next prime is 111988493. The reversal of 111988427 is 724889111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111988427 - 2⁴ = 111988411 is a prime.

It is not a weakly prime, because it can be changed into another prime (111988627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55994213 + 55994214.

It is an arithmetic number, because the mean of its divisors is an integer number (55994214).

Almost surely, 2^111988427 is an apocalyptic number.

111988427 is a deficient number, since it is larger than the sum of its proper divisors (1).

111988427 is an equidigital number, since it uses as much as digits as its factorization.

111988427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 41.

The square root of 111988427 is about 10582.4584572773. The cubic root of 111988427 is about 482.0118495391.

The spelling of 111988427 in words is "one hundred eleven million, nine hundred eighty-eight thousand, four hundred twenty-seven".