27684971 has 2 divisors, whose sum is σ = 27684972. Its totient is φ = 27684970.

The previous prime is 27684967. The next prime is 27685013. The reversal of 27684971 is 17948672.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27684971 - 2² = 27684967 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27684931) 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, 13842485 + 13842486.

It is an arithmetic number, because the mean of its divisors is an integer number (13842486).

Almost surely, 2^27684971 is an apocalyptic number.

27684971 is a deficient number, since it is larger than the sum of its proper divisors (1).

27684971 is an equidigital number, since it uses as much as digits as its factorization.

27684971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 44.

The square root of 27684971 is about 5261.6509766422. The cubic root of 27684971 is about 302.5157736009.

The spelling of 27684971 in words is "twenty-seven million, six hundred eighty-four thousand, nine hundred seventy-one".