26257613 has 2 divisors, whose sum is σ = 26257614. Its totient is φ = 26257612.

The previous prime is 26257607. The next prime is 26257663. The reversal of 26257613 is 31675262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20097289 + 6160324 = 4483^2 + 2482^2 .

It is a cyclic number.

It is not a de Polignac number, because 26257613 - 2⁶ = 26257549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26257613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26257603) 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, 13128806 + 13128807.

It is an arithmetic number, because the mean of its divisors is an integer number (13128807).

Almost surely, 2^26257613 is an apocalyptic number.

It is an amenable number.

26257613 is a deficient number, since it is larger than the sum of its proper divisors (1).

26257613 is an equidigital number, since it uses as much as digits as its factorization.

26257613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 32.

The square root of 26257613 is about 5124.2182818455. The cubic root of 26257613 is about 297.2248257042.

It can be divided in two parts, 262 and 57613, that added together give a palindrome (57875).

The spelling of 26257613 in words is "twenty-six million, two hundred fifty-seven thousand, six hundred thirteen".