13189409 has 2 divisors, whose sum is σ = 13189410. Its totient is φ = 13189408.

The previous prime is 13189369. The next prime is 13189411. The reversal of 13189409 is 90498131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12229009 + 960400 = 3497^2 + 980^2 .

It is an emirp because it is prime and its reverse (90498131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13189409 - 2⁸ = 13189153 is a prime.

Together with 13189411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13189499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6594704 + 6594705.

It is an arithmetic number, because the mean of its divisors is an integer number (6594705).

Almost surely, 2^13189409 is an apocalyptic number.

It is an amenable number.

13189409 is a deficient number, since it is larger than the sum of its proper divisors (1).

13189409 is an equidigital number, since it uses as much as digits as its factorization.

13189409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 13189409 is about 3631.7225940317. The cubic root of 13189409 is about 236.2699259996.

The spelling of 13189409 in words is "thirteen million, one hundred eighty-nine thousand, four hundred nine".