111916459 has 4 divisors (see below), whose sum is σ = 116782416. Its totient is φ = 107050504.

The previous prime is 111916439. The next prime is 111916471. The reversal of 111916459 is 954619111.

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

It is a cyclic number.

It is not a de Polignac number, because 111916459 - 2¹³ = 111908267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111916439) 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 3 ways as a sum of consecutive naturals, for example, 2432944 + ... + 2432989.

It is an arithmetic number, because the mean of its divisors is an integer number (29195604).

Almost surely, 2^111916459 is an apocalyptic number.

111916459 is a deficient number, since it is larger than the sum of its proper divisors (4865957).

111916459 is an equidigital number, since it uses as much as digits as its factorization.

111916459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4865956.

The product of its digits is 9720, while the sum is 37.

The square root of 111916459 is about 10579.0575667211. The cubic root of 111916459 is about 481.9085743963.

It can be divided in two parts, 1119 and 16459, that added together give a triangular number (17578 = T₁₈₇).

The spelling of 111916459 in words is "one hundred eleven million, nine hundred sixteen thousand, four hundred fifty-nine".