13105603 has 4 divisors (see below), whose sum is σ = 14977840. Its totient is φ = 11233368.

The previous prime is 13105601. The next prime is 13105613. The reversal of 13105603 is 30650131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30650131 = 151 ⋅202981.

It is a cyclic number.

It is not a de Polignac number, because 13105603 - 2¹ = 13105601 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (13105601) 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, 936108 + ... + 936121.

It is an arithmetic number, because the mean of its divisors is an integer number (3744460).

Almost surely, 2^13105603 is an apocalyptic number.

13105603 is a deficient number, since it is larger than the sum of its proper divisors (1872237).

13105603 is an equidigital number, since it uses as much as digits as its factorization.

13105603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872236.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 13105603 is about 3620.1661564077. The cubic root of 13105603 is about 235.7684396805.

Adding to 13105603 its reverse (30650131), we get a palindrome (43755734).

The spelling of 13105603 in words is "thirteen million, one hundred five thousand, six hundred three".