26209013 has 2 divisors, whose sum is σ = 26209014. Its totient is φ = 26209012.

The previous prime is 26209003. The next prime is 26209021. The reversal of 26209013 is 31090262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19562929 + 6646084 = 4423^2 + 2578^2 .

It is a cyclic number.

It is not a de Polignac number, because 26209013 - 2⁸ = 26208757 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 26209013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26209003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13104506 + 13104507.

It is an arithmetic number, because the mean of its divisors is an integer number (13104507).

Almost surely, 2^26209013 is an apocalyptic number.

It is an amenable number.

26209013 is a deficient number, since it is larger than the sum of its proper divisors (1).

26209013 is an equidigital number, since it uses as much as digits as its factorization.

26209013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 26209013 is about 5119.4738987517. The cubic root of 26209013 is about 297.0413354554.

Adding to 26209013 its reverse (31090262), we get a palindrome (57299275).

The spelling of 26209013 in words is "twenty-six million, two hundred nine thousand, thirteen".