27847213 has 2 divisors, whose sum is σ = 27847214. Its totient is φ = 27847212.

The previous prime is 27847201. The next prime is 27847231. The reversal of 27847213 is 31274872.

Together with next prime (27847231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27846729 + 484 = 5277^2 + 22^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27847213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27847913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13923606 + 13923607.

It is an arithmetic number, because the mean of its divisors is an integer number (13923607).

Almost surely, 2^27847213 is an apocalyptic number.

It is an amenable number.

27847213 is a deficient number, since it is larger than the sum of its proper divisors (1).

27847213 is an equidigital number, since it uses as much as digits as its factorization.

27847213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 34.

The square root of 27847213 is about 5277.0458591905. The cubic root of 27847213 is about 303.1055665155.

The spelling of 27847213 in words is "twenty-seven million, eight hundred forty-seven thousand, two hundred thirteen".