13409717 has 2 divisors, whose sum is σ = 13409718. Its totient is φ = 13409716.

The previous prime is 13409681. The next prime is 13409741. The reversal of 13409717 is 71790431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7214596 + 6195121 = 2686^2 + 2489^2 .

It is an emirp because it is prime and its reverse (71790431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13409717 - 2⁶ = 13409653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13409797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6704858 + 6704859.

It is an arithmetic number, because the mean of its divisors is an integer number (6704859).

Almost surely, 2^13409717 is an apocalyptic number.

It is an amenable number.

13409717 is a deficient number, since it is larger than the sum of its proper divisors (1).

13409717 is an equidigital number, since it uses as much as digits as its factorization.

13409717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 13409717 is about 3661.9280440773. The cubic root of 13409717 is about 237.5781726048.

The spelling of 13409717 in words is "thirteen million, four hundred nine thousand, seven hundred seventeen".