12738289 has 2 divisors, whose sum is σ = 12738290. Its totient is φ = 12738288.

The previous prime is 12738283. The next prime is 12738293. The reversal of 12738289 is 98283721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12496225 + 242064 = 3535^2 + 492^2 .

It is a cyclic number.

It is not a de Polignac number, because 12738289 - 2¹³ = 12730097 is a prime.

It is not a weakly prime, because it can be changed into another prime (12738283) 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, 6369144 + 6369145.

It is an arithmetic number, because the mean of its divisors is an integer number (6369145).

Almost surely, 2^12738289 is an apocalyptic number.

It is an amenable number.

12738289 is a deficient number, since it is larger than the sum of its proper divisors (1).

12738289 is an equidigital number, since it uses as much as digits as its factorization.

12738289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 12738289 is about 3569.0739695333. The cubic root of 12738289 is about 233.5448881783.

It can be divided in two parts, 127 and 38289, that added together give a 4-th power (38416 = 14⁴).

The spelling of 12738289 in words is "twelve million, seven hundred thirty-eight thousand, two hundred eighty-nine".