13109105 has 12 divisors (see below), whose sum is σ = 15948660. Its totient is φ = 10343904.

The previous prime is 13109101. The next prime is 13109111. The reversal of 13109105 is 50190131.

It can be written as a sum of positive squares in 2 ways, for example, as 8976016 + 4133089 = 2996^2 + 2033^2 .

It is not a de Polignac number, because 13109105 - 2² = 13109101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13109101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57131 + ... + 57359.

It is an arithmetic number, because the mean of its divisors is an integer number (1329055).

Almost surely, 2^13109105 is an apocalyptic number.

It is an amenable number.

13109105 is a deficient number, since it is larger than the sum of its proper divisors (2839555).

13109105 is an equidigital number, since it uses as much as digits as its factorization.

13109105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 20.

The square root of 13109105 is about 3620.6498035574. The cubic root of 13109105 is about 235.7894380159.

Adding to 13109105 its reverse (50190131), we get a palindrome (63299236).

The spelling of 13109105 in words is "thirteen million, one hundred nine thousand, one hundred five".