111972087 has 12 divisors (see below), whose sum is σ = 162810544. Its totient is φ = 74152800.

The previous prime is 111972083. The next prime is 111972097. The reversal of 111972087 is 780279111.

It is not a de Polignac number, because 111972087 - 2² = 111972083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111972083) 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 11 ways as a sum of consecutive naturals, for example, 39838 + ... + 42555.

Almost surely, 2^111972087 is an apocalyptic number.

111972087 is a deficient number, since it is larger than the sum of its proper divisors (50838457).

111972087 is a wasteful number, since it uses less digits than its factorization.

111972087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82550 (or 82547 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 36.

The square root of 111972087 is about 10581.6863967895. The cubic root of 111972087 is about 481.9884052811.

The spelling of 111972087 in words is "one hundred eleven million, nine hundred seventy-two thousand, eighty-seven".