13909717 has 2 divisors, whose sum is σ = 13909718. Its totient is φ = 13909716.

The previous prime is 13909699. The next prime is 13909741. The reversal of 13909717 is 71790931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9205156 + 4704561 = 3034^2 + 2169^2 .

It is a cyclic number.

It is not a de Polignac number, because 13909717 - 2¹⁵ = 13876949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13909117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6954858 + 6954859.

It is an arithmetic number, because the mean of its divisors is an integer number (6954859).

Almost surely, 2^13909717 is an apocalyptic number.

It is an amenable number.

13909717 is a deficient number, since it is larger than the sum of its proper divisors (1).

13909717 is an equidigital number, since it uses as much as digits as its factorization.

13909717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11907, while the sum is 37.

The square root of 13909717 is about 3729.5732999902. The cubic root of 13909717 is about 240.4950257082.

The spelling of 13909717 in words is "thirteen million, nine hundred nine thousand, seven hundred seventeen".