12129863 has 2 divisors, whose sum is σ = 12129864. Its totient is φ = 12129862.

The previous prime is 12129851. The next prime is 12129883. The reversal of 12129863 is 36892121.

12129863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12129863 - 2¹² = 12125767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12129883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6064931 + 6064932.

It is an arithmetic number, because the mean of its divisors is an integer number (6064932).

Almost surely, 2^12129863 is an apocalyptic number.

12129863 is a deficient number, since it is larger than the sum of its proper divisors (1).

12129863 is an equidigital number, since it uses as much as digits as its factorization.

12129863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 32.

The square root of 12129863 is about 3482.7952853994. The cubic root of 12129863 is about 229.7657539491.

The spelling of 12129863 in words is "twelve million, one hundred twenty-nine thousand, eight hundred sixty-three".