26465609 has 2 divisors, whose sum is σ = 26465610. Its totient is φ = 26465608.

The previous prime is 26465591. The next prime is 26465611. The reversal of 26465609 is 90656462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20839225 + 5626384 = 4565^2 + 2372^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26465609 is a prime.

Together with 26465611, 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 (26465669) 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, 13232804 + 13232805.

It is an arithmetic number, because the mean of its divisors is an integer number (13232805).

Almost surely, 2^26465609 is an apocalyptic number.

It is an amenable number.

26465609 is a deficient number, since it is larger than the sum of its proper divisors (1).

26465609 is an equidigital number, since it uses as much as digits as its factorization.

26465609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 26465609 is about 5144.4736368262. The cubic root of 26465609 is about 298.0075707879.

The spelling of 26465609 in words is "twenty-six million, four hundred sixty-five thousand, six hundred nine".