13109803 has 16 divisors (see below), whose sum is σ = 15716800. Its totient is φ = 10922688.

The previous prime is 13109779. The next prime is 13109809. The reversal of 13109803 is 30890131.

It is not a de Polignac number, because 13109803 - 2¹⁷ = 12978731 is a prime.

It is a Duffinian number.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13109809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12175 + ... + 13207.

It is an arithmetic number, because the mean of its divisors is an integer number (982300).

Almost surely, 2^13109803 is an apocalyptic number.

13109803 is a deficient number, since it is larger than the sum of its proper divisors (2606997).

13109803 is an equidigital number, since it uses as much as digits as its factorization.

13109803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091 (or 1077 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 13109803 is about 3620.7461938114. The cubic root of 13109803 is about 235.7936228454.

Adding to 13109803 its reverse (30890131), we get a palindrome (43999934).

The spelling of 13109803 in words is "thirteen million, one hundred nine thousand, eight hundred three".