12773861 has 2 divisors, whose sum is σ = 12773862. Its totient is φ = 12773860.

The previous prime is 12773857. The next prime is 12773863. The reversal of 12773861 is 16837721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12737761 + 36100 = 3569^2 + 190^2 .

It is a cyclic number.

It is not a de Polignac number, because 12773861 - 2² = 12773857 is a prime.

Together with 12773863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12773863) 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, 6386930 + 6386931.

It is an arithmetic number, because the mean of its divisors is an integer number (6386931).

Almost surely, 2^12773861 is an apocalyptic number.

It is an amenable number.

12773861 is a deficient number, since it is larger than the sum of its proper divisors (1).

12773861 is an equidigital number, since it uses as much as digits as its factorization.

12773861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 35.

The square root of 12773861 is about 3574.0538608141. The cubic root of 12773861 is about 233.7620795039.

The spelling of 12773861 in words is "twelve million, seven hundred seventy-three thousand, eight hundred sixty-one".