13727693209 has 2 divisors, whose sum is σ = 13727693210. Its totient is φ = 13727693208.

The previous prime is 13727693207. The next prime is 13727693227. The reversal of 13727693209 is 90239672731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7543443609 + 6184249600 = 86853^2 + 78640^2 .

It is a cyclic number.

It is not a de Polignac number, because 13727693209 - 2¹ = 13727693207 is a prime.

Together with 13727693207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13727693207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6863846604 + 6863846605.

It is an arithmetic number, because the mean of its divisors is an integer number (6863846605).

Almost surely, 2^13727693209 is an apocalyptic number.

It is an amenable number.

13727693209 is a deficient number, since it is larger than the sum of its proper divisors (1).

13727693209 is an equidigital number, since it uses as much as digits as its factorization.

13727693209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 49.

The spelling of 13727693209 in words is "thirteen billion, seven hundred twenty-seven million, six hundred ninety-three thousand, two hundred nine".