13212289 has 2 divisors, whose sum is σ = 13212290. Its totient is φ = 13212288.

The previous prime is 13212263. The next prime is 13212307. The reversal of 13212289 is 98221231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13082689 + 129600 = 3617^2 + 360^2 .

It is a cyclic number.

It is not a de Polignac number, because 13212289 - 2⁷ = 13212161 is a prime.

It is not a weakly prime, because it can be changed into another prime (13212229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6606144 + 6606145.

It is an arithmetic number, because the mean of its divisors is an integer number (6606145).

Almost surely, 2^13212289 is an apocalyptic number.

It is an amenable number.

13212289 is a deficient number, since it is larger than the sum of its proper divisors (1).

13212289 is an equidigital number, since it uses as much as digits as its factorization.

13212289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 28.

The square root of 13212289 is about 3634.8712494392. The cubic root of 13212289 is about 236.4064682062.

It can be divided in two parts, 132 and 12289, that added together give a palindrome (12421).

The spelling of 13212289 in words is "thirteen million, two hundred twelve thousand, two hundred eighty-nine".