13198109 has 2 divisors, whose sum is σ = 13198110. Its totient is φ = 13198108.

The previous prime is 13198099. The next prime is 13198127. The reversal of 13198109 is 90189131.

13198109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11628100 + 1570009 = 3410^2 + 1253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13198109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13198139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6599054 + 6599055.

It is an arithmetic number, because the mean of its divisors is an integer number (6599055).

Almost surely, 2^13198109 is an apocalyptic number.

It is an amenable number.

13198109 is a deficient number, since it is larger than the sum of its proper divisors (1).

13198109 is an equidigital number, since it uses as much as digits as its factorization.

13198109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 13198109 is about 3632.9201752860. The cubic root of 13198109 is about 236.3218640498.

The spelling of 13198109 in words is "thirteen million, one hundred ninety-eight thousand, one hundred nine".