111903 has 8 divisors (see below), whose sum is σ = 162816. Its totient is φ = 67800.

The previous prime is 111893. The next prime is 111913. The reversal of 111903 is 309111.

It is an interprime number because it is at equal distance from previous prime (111893) and next prime (111913).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111903 - 2⁵ = 111871 is a prime.

111903 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1663 + ... + 1728.

It is an arithmetic number, because the mean of its divisors is an integer number (20352).

2¹¹¹⁹⁰³ is an apocalyptic number.

111903 is a deficient number, since it is larger than the sum of its proper divisors (50913).

111903 is a wasteful number, since it uses less digits than its factorization.

111903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3405.

The product of its (nonzero) digits is 27, while the sum is 15.

The square root of 111903 is about 334.5190577531. The cubic root of 111903 is about 48.1889255619.

The spelling of 111903 in words is "one hundred eleven thousand, nine hundred three".