26255609 has 2 divisors, whose sum is σ = 26255610. Its totient is φ = 26255608.

The previous prime is 26255597. The next prime is 26255611. The reversal of 26255609 is 90655262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26214400 + 41209 = 5120^2 + 203^2 .

It is a cyclic number.

It is not a de Polignac number, because 26255609 - 2²⁰ = 25207033 is a prime.

Together with 26255611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26255629) 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, 13127804 + 13127805.

It is an arithmetic number, because the mean of its divisors is an integer number (13127805).

Almost surely, 2^26255609 is an apocalyptic number.

It is an amenable number.

26255609 is a deficient number, since it is larger than the sum of its proper divisors (1).

26255609 is an equidigital number, since it uses as much as digits as its factorization.

26255609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 26255609 is about 5124.0227360932. The cubic root of 26255609 is about 297.2172640406.

The spelling of 26255609 in words is "twenty-six million, two hundred fifty-five thousand, six hundred nine".