13685929 has 2 divisors, whose sum is σ = 13685930. Its totient is φ = 13685928.

The previous prime is 13685927. The next prime is 13685933. The reversal of 13685929 is 92958631.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8690704 + 4995225 = 2948^2 + 2235^2 .

It is a cyclic number.

It is not a de Polignac number, because 13685929 - 2¹ = 13685927 is a prime.

Together with 13685927, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13685927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6842964 + 6842965.

It is an arithmetic number, because the mean of its divisors is an integer number (6842965).

Almost surely, 2^13685929 is an apocalyptic number.

It is an amenable number.

13685929 is a deficient number, since it is larger than the sum of its proper divisors (1).

13685929 is an equidigital number, since it uses as much as digits as its factorization.

13685929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 43.

The square root of 13685929 is about 3699.4498239603. The cubic root of 13685929 is about 239.1983029991.

The spelling of 13685929 in words is "thirteen million, six hundred eighty-five thousand, nine hundred twenty-nine".