13823785709 has 2 divisors, whose sum is σ = 13823785710. Its totient is φ = 13823785708.

The previous prime is 13823785699. The next prime is 13823785721. The reversal of 13823785709 is 90758732831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13801080484 + 22705225 = 117478^2 + 4765^2 .

It is a cyclic number.

It is not a de Polignac number, because 13823785709 - 2²⁴ = 13807008493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13823785309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6911892854 + 6911892855.

It is an arithmetic number, because the mean of its divisors is an integer number (6911892855).

Almost surely, 2^13823785709 is an apocalyptic number.

It is an amenable number.

13823785709 is a deficient number, since it is larger than the sum of its proper divisors (1).

13823785709 is an equidigital number, since it uses as much as digits as its factorization.

13823785709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 13823785709 in words is "thirteen billion, eight hundred twenty-three million, seven hundred eighty-five thousand, seven hundred nine".