13812289 has 2 divisors, whose sum is σ = 13812290. Its totient is φ = 13812288.

The previous prime is 13812287. The next prime is 13812301. The reversal of 13812289 is 98221831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13727025 + 85264 = 3705^2 + 292^2 .

It is a cyclic number.

It is not a de Polignac number, because 13812289 - 2¹ = 13812287 is a prime.

Together with 13812287, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13812287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6906144 + 6906145.

It is an arithmetic number, because the mean of its divisors is an integer number (6906145).

Almost surely, 2^13812289 is an apocalyptic number.

It is an amenable number.

13812289 is a deficient number, since it is larger than the sum of its proper divisors (1).

13812289 is an equidigital number, since it uses as much as digits as its factorization.

13812289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 34.

The square root of 13812289 is about 3716.4887999293. The cubic root of 13812289 is about 239.9322088626.

The spelling of 13812289 in words is "thirteen million, eight hundred twelve thousand, two hundred eighty-nine".