12719789 has 2 divisors, whose sum is σ = 12719790. Its totient is φ = 12719788.

The previous prime is 12719783. The next prime is 12719803. The reversal of 12719789 is 98791721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12145225 + 574564 = 3485^2 + 758^2 .

It is a cyclic number.

It is not a de Polignac number, because 12719789 - 2⁸ = 12719533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12719783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6359894 + 6359895.

It is an arithmetic number, because the mean of its divisors is an integer number (6359895).

Almost surely, 2^12719789 is an apocalyptic number.

It is an amenable number.

12719789 is a deficient number, since it is larger than the sum of its proper divisors (1).

12719789 is an equidigital number, since it uses as much as digits as its factorization.

12719789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 44.

The square root of 12719789 is about 3566.4813191716. The cubic root of 12719789 is about 233.4317732031.

The spelling of 12719789 in words is "twelve million, seven hundred nineteen thousand, seven hundred eighty-nine".