111647987 has 8 divisors (see below), whose sum is σ = 122012352. Its totient is φ = 101319400.

The previous prime is 111647951. The next prime is 111647989. The reversal of 111647987 is 789746111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111647987 - 2¹² = 111643891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111647989) 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 7 ways as a sum of consecutive naturals, for example, 2189 + ... + 15102.

It is an arithmetic number, because the mean of its divisors is an integer number (15251544).

Almost surely, 2^111647987 is an apocalyptic number.

111647987 is a deficient number, since it is larger than the sum of its proper divisors (10364365).

111647987 is a wasteful number, since it uses less digits than its factorization.

111647987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17889.

The product of its digits is 84672, while the sum is 44.

The square root of 111647987 is about 10566.3611049405. The cubic root of 111647987 is about 481.5229220027.

The spelling of 111647987 in words is "one hundred eleven million, six hundred forty-seven thousand, nine hundred eighty-seven".