27684289 has 2 divisors, whose sum is σ = 27684290. Its totient is φ = 27684288.

The previous prime is 27684257. The next prime is 27684317. The reversal of 27684289 is 98248672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23357889 + 4326400 = 4833^2 + 2080^2 .

It is a cyclic number.

It is not a de Polignac number, because 27684289 - 2⁵ = 27684257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27684089) 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, 13842144 + 13842145.

It is an arithmetic number, because the mean of its divisors is an integer number (13842145).

Almost surely, 2^27684289 is an apocalyptic number.

It is an amenable number.

27684289 is a deficient number, since it is larger than the sum of its proper divisors (1).

27684289 is an equidigital number, since it uses as much as digits as its factorization.

27684289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 46.

The square root of 27684289 is about 5261.5861676875. The cubic root of 27684289 is about 302.5132894920.

The spelling of 27684289 in words is "twenty-seven million, six hundred eighty-four thousand, two hundred eighty-nine".