27371891 has 2 divisors, whose sum is σ = 27371892. Its totient is φ = 27371890.

The previous prime is 27371857. The next prime is 27371893. The reversal of 27371891 is 19817372.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27371891 - 2¹⁴ = 27355507 is a prime.

It is a Sophie Germain prime.

Together with 27371893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27371893) 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, 13685945 + 13685946.

It is an arithmetic number, because the mean of its divisors is an integer number (13685946).

Almost surely, 2^27371891 is an apocalyptic number.

27371891 is a deficient number, since it is larger than the sum of its proper divisors (1).

27371891 is an equidigital number, since it uses as much as digits as its factorization.

27371891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 38.

The square root of 27371891 is about 5231.8152681455. The cubic root of 27371891 is about 301.3710981604.

The spelling of 27371891 in words is "twenty-seven million, three hundred seventy-one thousand, eight hundred ninety-one".