111984987 has 8 divisors (see below), whose sum is σ = 149704704. Its totient is φ = 74460968.

The previous prime is 111984947. The next prime is 111984997. The reversal of 111984987 is 789489111.

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 111984987 - 2⁸ = 111984731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111984937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47583 + ... + 49880.

It is an arithmetic number, because the mean of its divisors is an integer number (18713088).

Almost surely, 2^111984987 is an apocalyptic number.

111984987 is a deficient number, since it is larger than the sum of its proper divisors (37719717).

111984987 is an equidigital number, since it uses as much as digits as its factorization.

111984987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97849.

The product of its digits is 145152, while the sum is 48.

The square root of 111984987 is about 10582.2959229082. The cubic root of 111984987 is about 482.0069140954.

The spelling of 111984987 in words is "one hundred eleven million, nine hundred eighty-four thousand, nine hundred eighty-seven".