13109311 has 4 divisors (see below), whose sum is σ = 13532224. Its totient is φ = 12686400.

The previous prime is 13109309. The next prime is 13109323. The reversal of 13109311 is 11390131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11390131 = 89 ⋅127979.

It is a cyclic number.

It is not a de Polignac number, because 13109311 - 2¹ = 13109309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13109111) 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, 211410 + ... + 211471.

It is an arithmetic number, because the mean of its divisors is an integer number (3383056).

Almost surely, 2^13109311 is an apocalyptic number.

13109311 is a deficient number, since it is larger than the sum of its proper divisors (422913).

13109311 is an equidigital number, since it uses as much as digits as its factorization.

13109311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422912.

The product of its (nonzero) digits is 81, while the sum is 19.

The square root of 13109311 is about 3620.6782513778. The cubic root of 13109311 is about 235.7906730956.

Adding to 13109311 its reverse (11390131), we get a palindrome (24499442).

The spelling of 13109311 in words is "thirteen million, one hundred nine thousand, three hundred eleven".