13811929909 has 2 divisors, whose sum is σ = 13811929910. Its totient is φ = 13811929908.

The previous prime is 13811929897. The next prime is 13811929927. The reversal of 13811929909 is 90992911831.

It is a happy number.

13811929909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9277927684 + 4534002225 = 96322^2 + 67335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13811929909 is a prime.

It is a super-2 number, since 2×13811929909² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13811929979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6905964954 + 6905964955.

It is an arithmetic number, because the mean of its divisors is an integer number (6905964955).

Almost surely, 2^13811929909 is an apocalyptic number.

It is an amenable number.

13811929909 is a deficient number, since it is larger than the sum of its proper divisors (1).

13811929909 is an equidigital number, since it uses as much as digits as its factorization.

13811929909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 52.

The spelling of 13811929909 in words is "thirteen billion, eight hundred eleven million, nine hundred twenty-nine thousand, nine hundred nine".