13109205 has 16 divisors (see below), whose sum is σ = 21320064. Its totient is φ = 6876480.

The previous prime is 13109203. The next prime is 13109237. The reversal of 13109205 is 50290131.

It is not a de Polignac number, because 13109205 - 2¹ = 13109203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13109203) 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 15 ways as a sum of consecutive naturals, for example, 6249 + ... + 8078.

It is an arithmetic number, because the mean of its divisors is an integer number (1332504).

Almost surely, 2^13109205 is an apocalyptic number.

13109205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13109205 is a deficient number, since it is larger than the sum of its proper divisors (8210859).

13109205 is a wasteful number, since it uses less digits than its factorization.

13109205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14396.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 13109205 is about 3620.6636132068. The cubic root of 13109205 is about 235.7900375708.

Adding to 13109205 its reverse (50290131), we get a palindrome (63399336).

The spelling of 13109205 in words is "thirteen million, one hundred nine thousand, two hundred five".