13965405709 has 2 divisors, whose sum is σ = 13965405710. Its totient is φ = 13965405708.

The previous prime is 13965405659. The next prime is 13965405733. The reversal of 13965405709 is 90750456931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13583203209 + 382202500 = 116547^2 + 19550^2 .

It is an emirp because it is prime and its reverse (90750456931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13965405709 - 2²³ = 13957017101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13965405749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6982702854 + 6982702855.

It is an arithmetic number, because the mean of its divisors is an integer number (6982702855).

Almost surely, 2^13965405709 is an apocalyptic number.

It is an amenable number.

13965405709 is a deficient number, since it is larger than the sum of its proper divisors (1).

13965405709 is an equidigital number, since it uses as much as digits as its factorization.

13965405709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1020600, while the sum is 49.

The spelling of 13965405709 in words is "thirteen billion, nine hundred sixty-five million, four hundred five thousand, seven hundred nine".