12683861 has 2 divisors, whose sum is σ = 12683862. Its totient is φ = 12683860.

The previous prime is 12683857. The next prime is 12683863. The reversal of 12683861 is 16838621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9186961 + 3496900 = 3031^2 + 1870^2 .

It is an emirp because it is prime and its reverse (16838621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12683861 - 2² = 12683857 is a prime.

Together with 12683863, 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 (12683863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6341930 + 6341931.

It is an arithmetic number, because the mean of its divisors is an integer number (6341931).

Almost surely, 2^12683861 is an apocalyptic number.

It is an amenable number.

12683861 is a deficient number, since it is larger than the sum of its proper divisors (1).

12683861 is an equidigital number, since it uses as much as digits as its factorization.

12683861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 35.

The square root of 12683861 is about 3561.4408601014. The cubic root of 12683861 is about 233.2117840852.

It can be divided in two parts, 1 and 2683861, that added together give a palindrome (2683862).

The spelling of 12683861 in words is "twelve million, six hundred eighty-three thousand, eight hundred sixty-one".