2118903 has 4 divisors (see below), whose sum is σ = 2825208. Its totient is φ = 1412600.

The previous prime is 2118889. The next prime is 2118917. The reversal of 2118903 is 3098112.

2118903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (2118889) and next prime (2118917).

It is a cyclic number.

It is not a de Polignac number, because 2118903 - 2⁵ = 2118871 is a prime.

It is a D-number.

2118903 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118923) 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 3 ways as a sum of consecutive naturals, for example, 353148 + ... + 353153.

It is an arithmetic number, because the mean of its divisors is an integer number (706302).

2^2118903 is an apocalyptic number.

2118903 is a deficient number, since it is larger than the sum of its proper divisors (706305).

2118903 is an equidigital number, since it uses as much as digits as its factorization.

2118903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706304.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 2118903 is about 1455.6452177643. The cubic root of 2118903 is about 128.4410040720.

The spelling of 2118903 in words is "two million, one hundred eighteen thousand, nine hundred three".