1109603 has 8 divisors (see below), whose sum is σ = 1220400. Its totient is φ = 1000480.

The previous prime is 1109579. The next prime is 1109609. The reversal of 1109603 is 3069011.

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

It is a cyclic number.

It is not a de Polignac number, because 1109603 - 2⁸ = 1109347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1109609) 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, 1301 + ... + 1977.

It is an arithmetic number, because the mean of its divisors is an integer number (152550).

2^1109603 is an apocalyptic number.

1109603 is a deficient number, since it is larger than the sum of its proper divisors (110797).

1109603 is a wasteful number, since it uses less digits than its factorization.

1109603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 1109603 is about 1053.3769505737. The cubic root of 1109603 is about 103.5275351292.

The spelling of 1109603 in words is "one million, one hundred nine thousand, six hundred three".