12636709 has 2 divisors, whose sum is σ = 12636710. Its totient is φ = 12636708.

The previous prime is 12636707. The next prime is 12636719. The reversal of 12636709 is 90763621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12096484 + 540225 = 3478^2 + 735^2 .

It is a cyclic number.

It is not a de Polignac number, because 12636709 - 2¹ = 12636707 is a prime.

Together with 12636707, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12636703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6318354 + 6318355.

It is an arithmetic number, because the mean of its divisors is an integer number (6318355).

Almost surely, 2^12636709 is an apocalyptic number.

It is an amenable number.

12636709 is a deficient number, since it is larger than the sum of its proper divisors (1).

12636709 is an equidigital number, since it uses as much as digits as its factorization.

12636709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 12636709 is about 3554.8149037608. The cubic root of 12636709 is about 232.9224385261.

The spelling of 12636709 in words is "twelve million, six hundred thirty-six thousand, seven hundred nine".