26605013 has 2 divisors, whose sum is σ = 26605014. Its totient is φ = 26605012.

The previous prime is 26605001. The next prime is 26605039. The reversal of 26605013 is 31050662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26604964 + 49 = 5158^2 + 7^2 .

It is a cyclic number.

It is not a de Polignac number, because 26605013 - 2¹⁰ = 26603989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26605013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26605213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13302506 + 13302507.

It is an arithmetic number, because the mean of its divisors is an integer number (13302507).

Almost surely, 2^26605013 is an apocalyptic number.

It is an amenable number.

26605013 is a deficient number, since it is larger than the sum of its proper divisors (1).

26605013 is an equidigital number, since it uses as much as digits as its factorization.

26605013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 26605013 is about 5158.0047499009. The cubic root of 26605013 is about 298.5298929031.

Adding to 26605013 its reverse (31050662), we get a palindrome (57655675).

The spelling of 26605013 in words is "twenty-six million, six hundred five thousand, thirteen".