26533813 has 2 divisors, whose sum is σ = 26533814. Its totient is φ = 26533812.

The previous prime is 26533783. The next prime is 26533831. The reversal of 26533813 is 31833562.

Together with next prime (26533831) 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., 26193924 + 339889 = 5118^2 + 583^2 .

It is a cyclic number.

It is not a de Polignac number, because 26533813 - 2⁵ = 26533781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26533853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13266906 + 13266907.

It is an arithmetic number, because the mean of its divisors is an integer number (13266907).

Almost surely, 2^26533813 is an apocalyptic number.

It is an amenable number.

26533813 is a deficient number, since it is larger than the sum of its proper divisors (1).

26533813 is an equidigital number, since it uses as much as digits as its factorization.

26533813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 31.

The square root of 26533813 is about 5151.0982324161. The cubic root of 26533813 is about 298.2633476760.

The spelling of 26533813 in words is "twenty-six million, five hundred thirty-three thousand, eight hundred thirteen".