13686769 has 2 divisors, whose sum is σ = 13686770. Its totient is φ = 13686768.

The previous prime is 13686767. The next prime is 13686787. The reversal of 13686769 is 96768631.

13686769 is digitally balanced in base 3, 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., 12341169 + 1345600 = 3513^2 + 1160^2 .

It is a cyclic number.

It is not a de Polignac number, because 13686769 - 2¹ = 13686767 is a prime.

It is a super-2 number, since 2×13686769² = 374655291318722, which contains 22 as substring.

Together with 13686767, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13686763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6843384 + 6843385.

It is an arithmetic number, because the mean of its divisors is an integer number (6843385).

Almost surely, 2^13686769 is an apocalyptic number.

It is an amenable number.

13686769 is a deficient number, since it is larger than the sum of its proper divisors (1).

13686769 is an equidigital number, since it uses as much as digits as its factorization.

13686769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The square root of 13686769 is about 3699.5633526134. The cubic root of 13686769 is about 239.2031966497.

It can be divided in two parts, 1368676 and 9, that added together give a triangular number (1368685 = T₁₆₅₄).

The spelling of 13686769 in words is "thirteen million, six hundred eighty-six thousand, seven hundred sixty-nine".