111984387 has 4 divisors (see below), whose sum is σ = 149312520. Its totient is φ = 74656256.

The previous prime is 111984361. The next prime is 111984413. The reversal of 111984387 is 783489111.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (111984361) and next prime (111984413).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111984387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111984337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18664062 + ... + 18664067.

It is an arithmetic number, because the mean of its divisors is an integer number (37328130).

Almost surely, 2^111984387 is an apocalyptic number.

111984387 is a deficient number, since it is larger than the sum of its proper divisors (37328133).

111984387 is an equidigital number, since it uses as much as digits as its factorization.

111984387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37328132.

The product of its digits is 48384, while the sum is 42.

The square root of 111984387 is about 10582.2675736347. The cubic root of 111984387 is about 482.0060532518.

The spelling of 111984387 in words is "one hundred eleven million, nine hundred eighty-four thousand, three hundred eighty-seven".