12779687 has 2 divisors, whose sum is σ = 12779688. Its totient is φ = 12779686.

The previous prime is 12779677. The next prime is 12779693. The reversal of 12779687 is 78697721.

It is a strong prime.

It is an emirp because it is prime and its reverse (78697721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12779687 - 2⁴ = 12779671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12779677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6389843 + 6389844.

It is an arithmetic number, because the mean of its divisors is an integer number (6389844).

Almost surely, 2^12779687 is an apocalyptic number.

12779687 is a deficient number, since it is larger than the sum of its proper divisors (1).

12779687 is an equidigital number, since it uses as much as digits as its factorization.

12779687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 47.

The square root of 12779687 is about 3574.8688087817. The cubic root of 12779687 is about 233.7976127667.

The spelling of 12779687 in words is "twelve million, seven hundred seventy-nine thousand, six hundred eighty-seven".