13685957 has 2 divisors, whose sum is σ = 13685958. Its totient is φ = 13685956.

The previous prime is 13685939. The next prime is 13685981. The reversal of 13685957 is 75958631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7540516 + 6145441 = 2746^2 + 2479^2 .

It is a cyclic number.

It is not a de Polignac number, because 13685957 - 2¹⁶ = 13620421 is a prime.

It is a Chen prime.

It is a congruent number.

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, 6842978 + 6842979.

It is an arithmetic number, because the mean of its divisors is an integer number (6842979).

Almost surely, 2^13685957 is an apocalyptic number.

It is an amenable number.

13685957 is a deficient number, since it is larger than the sum of its proper divisors (1).

13685957 is an equidigital number, since it uses as much as digits as its factorization.

13685957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 44.

The square root of 13685957 is about 3699.4536083049. The cubic root of 13685957 is about 239.1984661240.

The spelling of 13685957 in words is "thirteen million, six hundred eighty-five thousand, nine hundred fifty-seven".