26605609 has 2 divisors, whose sum is σ = 26605610. Its totient is φ = 26605608.

The previous prime is 26605591. The next prime is 26605613. The reversal of 26605609 is 90650662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21529600 + 5076009 = 4640^2 + 2253^2 .

It is a cyclic number.

It is not a de Polignac number, because 26605609 - 2¹⁵ = 26572841 is a prime.

It is not a weakly prime, because it can be changed into another prime (26605309) 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, 13302804 + 13302805.

It is an arithmetic number, because the mean of its divisors is an integer number (13302805).

Almost surely, 2^26605609 is an apocalyptic number.

It is an amenable number.

26605609 is a deficient number, since it is larger than the sum of its proper divisors (1).

26605609 is an equidigital number, since it uses as much as digits as its factorization.

26605609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 26605609 is about 5158.0625238553. The cubic root of 26605609 is about 298.5321220881.

The spelling of 26605609 in words is "twenty-six million, six hundred five thousand, six hundred nine".