12686629 has 2 divisors, whose sum is σ = 12686630. Its totient is φ = 12686628.

The previous prime is 12686627. The next prime is 12686647. The reversal of 12686629 is 92668621.

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., 11573604 + 1113025 = 3402^2 + 1055^2 .

It is an emirp because it is prime and its reverse (92668621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12686629 - 2¹ = 12686627 is a prime.

Together with 12686627, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 12686591 and 12686600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12686627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6343314 + 6343315.

It is an arithmetic number, because the mean of its divisors is an integer number (6343315).

Almost surely, 2^12686629 is an apocalyptic number.

It is an amenable number.

12686629 is a deficient number, since it is larger than the sum of its proper divisors (1).

12686629 is an equidigital number, since it uses as much as digits as its factorization.

12686629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 40.

The square root of 12686629 is about 3561.8294456641. The cubic root of 12686629 is about 233.2287474600.

The spelling of 12686629 in words is "twelve million, six hundred eighty-six thousand, six hundred twenty-nine".