26135513 has 2 divisors, whose sum is σ = 26135514. Its totient is φ = 26135512.

The previous prime is 26135471. The next prime is 26135531. The reversal of 26135513 is 31553162.

Together with next prime (26135531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16875664 + 9259849 = 4108^2 + 3043^2 .

It is a cyclic number.

It is not a de Polignac number, because 26135513 - 2²⁰ = 25086937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (26134513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13067756 + 13067757.

It is an arithmetic number, because the mean of its divisors is an integer number (13067757).

Almost surely, 2^26135513 is an apocalyptic number.

It is an amenable number.

26135513 is a deficient number, since it is larger than the sum of its proper divisors (1).

26135513 is an equidigital number, since it uses as much as digits as its factorization.

26135513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 26.

The square root of 26135513 is about 5112.2903869010. The cubic root of 26135513 is about 296.7634033446.

Adding to 26135513 its reverse (31553162), we get a palindrome (57688675).

The spelling of 26135513 in words is "twenty-six million, one hundred thirty-five thousand, five hundred thirteen".