111989387 has 8 divisors (see below), whose sum is σ = 122666400. Its totient is φ = 101766784.

The previous prime is 111989377. The next prime is 111989399. The reversal of 111989387 is 783989111.

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 111989387 - 2²⁴ = 95212171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111989357) 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, 113087 + ... + 114072.

It is an arithmetic number, because the mean of its divisors is an integer number (15333300).

Almost surely, 2^111989387 is an apocalyptic number.

111989387 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

111989387 is a deficient number, since it is larger than the sum of its proper divisors (10677013).

111989387 is a wasteful number, since it uses less digits than its factorization.

111989387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227205.

The product of its digits is 108864, while the sum is 47.

The square root of 111989387 is about 10582.5038152604. The cubic root of 111989387 is about 482.0132268542.

The spelling of 111989387 in words is "one hundred eleven million, nine hundred eighty-nine thousand, three hundred eighty-seven".