12761813 has 2 divisors, whose sum is σ = 12761814. Its totient is φ = 12761812.

The previous prime is 12761807. The next prime is 12761851. The reversal of 12761813 is 31816721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6646084 + 6115729 = 2578^2 + 2473^2 .

It is an emirp because it is prime and its reverse (31816721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12761813 - 2⁴ = 12761797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12761893) 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, 6380906 + 6380907.

It is an arithmetic number, because the mean of its divisors is an integer number (6380907).

Almost surely, 2^12761813 is an apocalyptic number.

It is an amenable number.

12761813 is a deficient number, since it is larger than the sum of its proper divisors (1).

12761813 is an equidigital number, since it uses as much as digits as its factorization.

12761813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 29.

The square root of 12761813 is about 3572.3679821653. The cubic root of 12761813 is about 233.6885634531.

The spelling of 12761813 in words is "twelve million, seven hundred sixty-one thousand, eight hundred thirteen".