1109803 has 4 divisors (see below), whose sum is σ = 1114920. Its totient is φ = 1104688.

The previous prime is 1109791. The next prime is 1109813. The reversal of 1109803 is 3089011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3089011 = 83 ⋅37217.

It is a cyclic number.

It is not a de Polignac number, because 1109803 - 2⁹ = 1109291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1109813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2218 + ... + 2671.

It is an arithmetic number, because the mean of its divisors is an integer number (278730).

2^1109803 is an apocalyptic number.

1109803 is a deficient number, since it is larger than the sum of its proper divisors (5117).

1109803 is an equidigital number, since it uses as much as digits as its factorization.

1109803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5116.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1109803 is about 1053.4718790741. The cubic root of 1109803 is about 103.5337548502.

The spelling of 1109803 in words is "one million, one hundred nine thousand, eight hundred three".