27526813 has 2 divisors, whose sum is σ = 27526814. Its totient is φ = 27526812.

The previous prime is 27526781. The next prime is 27526831. The reversal of 27526813 is 31862572.

It is a happy number.

Together with next prime (27526831) 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., 17623204 + 9903609 = 4198^2 + 3147^2 .

It is a cyclic number.

It is not a de Polignac number, because 27526813 - 2⁵ = 27526781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27526313) 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, 13763406 + 13763407.

It is an arithmetic number, because the mean of its divisors is an integer number (13763407).

Almost surely, 2^27526813 is an apocalyptic number.

It is an amenable number.

27526813 is a deficient number, since it is larger than the sum of its proper divisors (1).

27526813 is an equidigital number, since it uses as much as digits as its factorization.

27526813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 27526813 is about 5246.6001372317. The cubic root of 27526813 is about 301.9386049779.

The spelling of 27526813 in words is "twenty-seven million, five hundred twenty-six thousand, eight hundred thirteen".