12890789 has 2 divisors, whose sum is σ = 12890790. Its totient is φ = 12890788.

The previous prime is 12890783. The next prime is 12890791. The reversal of 12890789 is 98709821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12837889 + 52900 = 3583^2 + 230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12890789 is a prime.

Together with 12890791, 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 (12890783) 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, 6445394 + 6445395.

It is an arithmetic number, because the mean of its divisors is an integer number (6445395).

Almost surely, 2^12890789 is an apocalyptic number.

It is an amenable number.

12890789 is a deficient number, since it is larger than the sum of its proper divisors (1).

12890789 is an equidigital number, since it uses as much as digits as its factorization.

12890789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 12890789 is about 3590.3744930021. The cubic root of 12890789 is about 234.4731762682.

The spelling of 12890789 in words is "twelve million, eight hundred ninety thousand, seven hundred eighty-nine".