12606889 has 2 divisors, whose sum is σ = 12606890. Its totient is φ = 12606888.

The previous prime is 12606887. The next prime is 12606901. The reversal of 12606889 is 98860621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10188864 + 2418025 = 3192^2 + 1555^2 .

It is an emirp because it is prime and its reverse (98860621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12606889 - 2¹ = 12606887 is a prime.

Together with 12606887, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12606887) 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, 6303444 + 6303445.

It is an arithmetic number, because the mean of its divisors is an integer number (6303445).

Almost surely, 2^12606889 is an apocalyptic number.

It is an amenable number.

12606889 is a deficient number, since it is larger than the sum of its proper divisors (1).

12606889 is an equidigital number, since it uses as much as digits as its factorization.

12606889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 12606889 is about 3550.6181152019. The cubic root of 12606889 is about 232.7390780801.

The spelling of 12606889 in words is "twelve million, six hundred six thousand, eight hundred eighty-nine".