12687613 has 2 divisors, whose sum is σ = 12687614. Its totient is φ = 12687612.

The previous prime is 12687607. The next prime is 12687659. The reversal of 12687613 is 31678621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10004569 + 2683044 = 3163^2 + 1638^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12687613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12687673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6343806 + 6343807.

It is an arithmetic number, because the mean of its divisors is an integer number (6343807).

Almost surely, 2^12687613 is an apocalyptic number.

It is an amenable number.

12687613 is a deficient number, since it is larger than the sum of its proper divisors (1).

12687613 is an equidigital number, since it uses as much as digits as its factorization.

12687613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 34.

The square root of 12687613 is about 3561.9675742488. The cubic root of 12687613 is about 233.2347771982.

The spelling of 12687613 in words is "twelve million, six hundred eighty-seven thousand, six hundred thirteen".