26948209 has 2 divisors, whose sum is σ = 26948210. Its totient is φ = 26948208.

The previous prime is 26948189. The next prime is 26948219. The reversal of 26948209 is 90284962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20430400 + 6517809 = 4520^2 + 2553^2 .

It is a cyclic number.

It is not a de Polignac number, because 26948209 - 2⁵ = 26948177 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26948219) 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, 13474104 + 13474105.

It is an arithmetic number, because the mean of its divisors is an integer number (13474105).

Almost surely, 2^26948209 is an apocalyptic number.

It is an amenable number.

26948209 is a deficient number, since it is larger than the sum of its proper divisors (1).

26948209 is an equidigital number, since it uses as much as digits as its factorization.

26948209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 26948209 is about 5191.1664392504. The cubic root of 26948209 is about 299.8080587028.

The spelling of 26948209 in words is "twenty-six million, nine hundred forty-eight thousand, two hundred nine".