13879109 has 2 divisors, whose sum is σ = 13879110. Its totient is φ = 13879108.

The previous prime is 13879091. The next prime is 13879121. The reversal of 13879109 is 90197831.

Together with previous prime (13879091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7579009 + 6300100 = 2753^2 + 2510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13879109 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13879309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6939554 + 6939555.

It is an arithmetic number, because the mean of its divisors is an integer number (6939555).

Almost surely, 2^13879109 is an apocalyptic number.

It is an amenable number.

13879109 is a deficient number, since it is larger than the sum of its proper divisors (1).

13879109 is an equidigital number, since it uses as much as digits as its factorization.

13879109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 13879109 is about 3725.4676216550. The cubic root of 13879109 is about 240.3184949744.

The spelling of 13879109 in words is "thirteen million, eight hundred seventy-nine thousand, one hundred nine".