12789289 has 2 divisors, whose sum is σ = 12789290. Its totient is φ = 12789288.

The previous prime is 12789269. The next prime is 12789307. The reversal of 12789289 is 98298721.

12789289 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6579225 + 6210064 = 2565^2 + 2492^2 .

It is a cyclic number.

It is not a de Polignac number, because 12789289 - 2¹⁵ = 12756521 is a prime.

It is not a weakly prime, because it can be changed into another prime (12789209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6394644 + 6394645.

It is an arithmetic number, because the mean of its divisors is an integer number (6394645).

Almost surely, 2^12789289 is an apocalyptic number.

It is an amenable number.

12789289 is a deficient number, since it is larger than the sum of its proper divisors (1).

12789289 is an equidigital number, since it uses as much as digits as its factorization.

12789289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 46.

The square root of 12789289 is about 3576.2115429600. The cubic root of 12789289 is about 233.8561526112.

The spelling of 12789289 in words is "twelve million, seven hundred eighty-nine thousand, two hundred eighty-nine".