27101891 has 2 divisors, whose sum is σ = 27101892. Its totient is φ = 27101890.

The previous prime is 27101857. The next prime is 27101909. The reversal of 27101891 is 19810172.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27101891 is a prime.

It is not a weakly prime, because it can be changed into another prime (27101801) 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, 13550945 + 13550946.

It is an arithmetic number, because the mean of its divisors is an integer number (13550946).

Almost surely, 2^27101891 is an apocalyptic number.

27101891 is a deficient number, since it is larger than the sum of its proper divisors (1).

27101891 is an equidigital number, since it uses as much as digits as its factorization.

27101891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 27101891 is about 5205.9476562870. The cubic root of 27101891 is about 300.3769003628.

The spelling of 27101891 in words is "twenty-seven million, one hundred one thousand, eight hundred ninety-one".