12866089 has 2 divisors, whose sum is σ = 12866090. Its totient is φ = 12866088.

The previous prime is 12866083. The next prime is 12866101. The reversal of 12866089 is 98066821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9406489 + 3459600 = 3067^2 + 1860^2 .

It is an emirp because it is prime and its reverse (98066821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12866089 is a prime.

It is not a weakly prime, because it can be changed into another prime (12866083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6433044 + 6433045.

It is an arithmetic number, because the mean of its divisors is an integer number (6433045).

Almost surely, 2^12866089 is an apocalyptic number.

It is an amenable number.

12866089 is a deficient number, since it is larger than the sum of its proper divisors (1).

12866089 is an equidigital number, since it uses as much as digits as its factorization.

12866089 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 12866089 is about 3586.9330910961. The cubic root of 12866089 is about 234.3233227458.

The spelling of 12866089 in words is "twelve million, eight hundred sixty-six thousand, eighty-nine".