26560813 has 2 divisors, whose sum is σ = 26560814. Its totient is φ = 26560812.

The previous prime is 26560811. The next prime is 26560843. The reversal of 26560813 is 31806562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19474569 + 7086244 = 4413^2 + 2662^2 .

It is a cyclic number.

It is not a de Polignac number, because 26560813 - 2¹ = 26560811 is a prime.

Together with 26560811, it forms a pair of twin primes.

It is equal to p_1657408 and since 26560813 and 1657408 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26560811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13280406 + 13280407.

It is an arithmetic number, because the mean of its divisors is an integer number (13280407).

Almost surely, 2^26560813 is an apocalyptic number.

It is an amenable number.

26560813 is a deficient number, since it is larger than the sum of its proper divisors (1).

26560813 is an equidigital number, since it uses as much as digits as its factorization.

26560813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 26560813 is about 5153.7183663836. The cubic root of 26560813 is about 298.3644812798.

The spelling of 26560813 in words is "twenty-six million, five hundred sixty thousand, eight hundred thirteen".