27864671 has 2 divisors, whose sum is σ = 27864672. Its totient is φ = 27864670.

The previous prime is 27864653. The next prime is 27864673. The reversal of 27864671 is 17646872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27864671 - 2⁶ = 27864607 is a prime.

Together with 27864673, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27864673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13932335 + 13932336.

It is an arithmetic number, because the mean of its divisors is an integer number (13932336).

Almost surely, 2^27864671 is an apocalyptic number.

27864671 is a deficient number, since it is larger than the sum of its proper divisors (1).

27864671 is an equidigital number, since it uses as much as digits as its factorization.

27864671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 41.

The square root of 27864671 is about 5278.6997452024. The cubic root of 27864671 is about 303.1688943556.

The spelling of 27864671 in words is "twenty-seven million, eight hundred sixty-four thousand, six hundred seventy-one".