111233987 has 2 divisors, whose sum is σ = 111233988. Its totient is φ = 111233986.

The previous prime is 111233977. The next prime is 111233989. The reversal of 111233987 is 789332111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111233987 - 2¹⁰ = 111232963 is a prime.

Together with 111233989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111233989) 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, 55616993 + 55616994.

It is an arithmetic number, because the mean of its divisors is an integer number (55616994).

Almost surely, 2^111233987 is an apocalyptic number.

111233987 is a deficient number, since it is larger than the sum of its proper divisors (1).

111233987 is an equidigital number, since it uses as much as digits as its factorization.

111233987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 35.

The square root of 111233987 is about 10546.7524385471. The cubic root of 111233987 is about 480.9270091798.

The spelling of 111233987 in words is "one hundred eleven million, two hundred thirty-three thousand, nine hundred eighty-seven".