13109 has 2 divisors, whose sum is σ = 13110. Its totient is φ = 13108.
The previous prime is 13103. The next prime is 13121. The reversal of 13109 is 90131.
13109 is nontrivially palindromic in base 7.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 10609 + 2500 = 103^2 + 50^2 .
It is a cyclic number.
It is not a de Polignac number, because 13109 - 24 = 13093 is a prime.
It is a Chen prime.
It is a plaindrome in base 16.
It is a junction number, because it is equal to n+sod(n) for n = 13093 and 13102.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (13103) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6554 + 6555.
It is an arithmetic number, because the mean of its divisors is an integer number (6555).
213109 is an apocalyptic number.
It is an amenable number.
13109 is a deficient number, since it is larger than the sum of its proper divisors (1).
13109 is an equidigital number, since it uses as much as digits as its factorization.
13109 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 27, while the sum is 14.
The square root of 13109 is about 114.4945413546. The cubic root of 13109 is about 23.5788808480.
The spelling of 13109 in words is "thirteen thousand, one hundred nine".
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