1103909 has 4 divisors (see below), whose sum is σ = 1106016. Its totient is φ = 1101804.

The previous prime is 1103903. The next prime is 1103911. The reversal of 1103909 is 9093011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9093011 = 17 ⋅534883.

It is a cyclic number.

It is not a de Polignac number, because 1103909 - 2²⁰ = 55333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103903) 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, 422 + ... + 1544.

It is an arithmetic number, because the mean of its divisors is an integer number (276504).

2^1103909 is an apocalyptic number.

It is an amenable number.

1103909 is a deficient number, since it is larger than the sum of its proper divisors (2107).

1103909 is an equidigital number, since it uses as much as digits as its factorization.

1103909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106.

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

The square root of 1103909 is about 1050.6707381478. The cubic root of 1103909 is about 103.3501452586.

The spelling of 1103909 in words is "one million, one hundred three thousand, nine hundred nine".