13685669 has 2 divisors, whose sum is σ = 13685670. Its totient is φ = 13685668.

The previous prime is 13685657. The next prime is 13685687. The reversal of 13685669 is 96658631.

13685669 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., 10640644 + 3045025 = 3262^2 + 1745^2 .

It is an emirp because it is prime and its reverse (96658631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13685669 - 2¹⁶ = 13620133 is a prime.

It is a super-2 number, since 2×13685669² = 374595071955122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13685689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6842834 + 6842835.

It is an arithmetic number, because the mean of its divisors is an integer number (6842835).

Almost surely, 2^13685669 is an apocalyptic number.

It is an amenable number.

13685669 is a deficient number, since it is larger than the sum of its proper divisors (1).

13685669 is an equidigital number, since it uses as much as digits as its factorization.

13685669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 44.

The square root of 13685669 is about 3699.4146834330. The cubic root of 13685669 is about 239.1967882572.

The spelling of 13685669 in words is "thirteen million, six hundred eighty-five thousand, six hundred sixty-nine".