12878839 has 2 divisors, whose sum is σ = 12878840. Its totient is φ = 12878838.

The previous prime is 12878783. The next prime is 12878851. The reversal of 12878839 is 93887821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12878839 - 2¹¹ = 12876791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12878039) 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, 6439419 + 6439420.

It is an arithmetic number, because the mean of its divisors is an integer number (6439420).

Almost surely, 2^12878839 is an apocalyptic number.

12878839 is a deficient number, since it is larger than the sum of its proper divisors (1).

12878839 is an equidigital number, since it uses as much as digits as its factorization.

12878839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 46.

The square root of 12878839 is about 3588.7099353389. The cubic root of 12878839 is about 234.4007002099.

The spelling of 12878839 in words is "twelve million, eight hundred seventy-eight thousand, eight hundred thirty-nine".