13685773 has 2 divisors, whose sum is σ = 13685774. Its totient is φ = 13685772.

The previous prime is 13685741. The next prime is 13685783. The reversal of 13685773 is 37758631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13638249 + 47524 = 3693^2 + 218^2 .

It is a cyclic number.

It is not a de Polignac number, because 13685773 - 2⁵ = 13685741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13685783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6842886 + 6842887.

It is an arithmetic number, because the mean of its divisors is an integer number (6842887).

Almost surely, 2^13685773 is an apocalyptic number.

It is an amenable number.

13685773 is a deficient number, since it is larger than the sum of its proper divisors (1).

13685773 is an equidigital number, since it uses as much as digits as its factorization.

13685773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 40.

The square root of 13685773 is about 3699.4287396840. The cubic root of 13685773 is about 239.1973941562.

The spelling of 13685773 in words is "thirteen million, six hundred eighty-five thousand, seven hundred seventy-three".