12626909 has 2 divisors, whose sum is σ = 12626910. Its totient is φ = 12626908.

The previous prime is 12626891. The next prime is 12626917. The reversal of 12626909 is 90962621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10582009 + 2044900 = 3253^2 + 1430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12626909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12626989) 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, 6313454 + 6313455.

It is an arithmetic number, because the mean of its divisors is an integer number (6313455).

Almost surely, 2^12626909 is an apocalyptic number.

It is an amenable number.

12626909 is a deficient number, since it is larger than the sum of its proper divisors (1).

12626909 is an equidigital number, since it uses as much as digits as its factorization.

12626909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 12626909 is about 3553.4362242764. The cubic root of 12626909 is about 232.8622110774.

The spelling of 12626909 in words is "twelve million, six hundred twenty-six thousand, nine hundred nine".