1109903 has 2 divisors, whose sum is σ = 1109904. Its totient is φ = 1109902.

The previous prime is 1109897. The next prime is 1109909. The reversal of 1109903 is 3099011.

It is a balanced prime because it is at equal distance from previous prime (1109897) and next prime (1109909).

It is an emirp because it is prime and its reverse (3099011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1109903 - 2⁴ = 1109887 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1109909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554951 + 554952.

It is an arithmetic number, because the mean of its divisors is an integer number (554952).

2^1109903 is an apocalyptic number.

1109903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109903 is an equidigital number, since it uses as much as digits as its factorization.

1109903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 1109903 is about 1053.5193401167. The cubic root of 1109903 is about 103.5368644304.

The spelling of 1109903 in words is "one million, one hundred nine thousand, nine hundred three".