13197109 has 2 divisors, whose sum is σ = 13197110. Its totient is φ = 13197108.

The previous prime is 13197097. The next prime is 13197127. The reversal of 13197109 is 90179131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10956100 + 2241009 = 3310^2 + 1497^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13197109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13197169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6598554 + 6598555.

It is an arithmetic number, because the mean of its divisors is an integer number (6598555).

Almost surely, 2^13197109 is an apocalyptic number.

It is an amenable number.

13197109 is a deficient number, since it is larger than the sum of its proper divisors (1).

13197109 is an equidigital number, since it uses as much as digits as its factorization.

13197109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1701, while the sum is 31.

The square root of 13197109 is about 3632.7825423496. The cubic root of 13197109 is about 236.3158953202.

The spelling of 13197109 in words is "thirteen million, one hundred ninety-seven thousand, one hundred nine".