13109813 has 4 divisors (see below), whose sum is σ = 13275840. Its totient is φ = 12943788.

The previous prime is 13109809. The next prime is 13109843. The reversal of 13109813 is 31890131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13109813 - 2² = 13109809 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 (13109843) 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, 82895 + ... + 83052.

It is an arithmetic number, because the mean of its divisors is an integer number (3318960).

Almost surely, 2^13109813 is an apocalyptic number.

It is an amenable number.

13109813 is a deficient number, since it is larger than the sum of its proper divisors (166027).

13109813 is an equidigital number, since it uses as much as digits as its factorization.

13109813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166026.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 13109813 is about 3620.7475747420. The cubic root of 13109813 is about 235.7936827989.

Adding to 13109813 its reverse (31890131), we get a palindrome (44999944).

The spelling of 13109813 in words is "thirteen million, one hundred nine thousand, eight hundred thirteen".