27000191 has 2 divisors, whose sum is σ = 27000192. Its totient is φ = 27000190.

The previous prime is 27000187. The next prime is 27000203. The reversal of 27000191 is 19100072.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27000191 - 2² = 27000187 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27000991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13500095 + 13500096.

It is an arithmetic number, because the mean of its divisors is an integer number (13500096).

Almost surely, 2^27000191 is an apocalyptic number.

27000191 is a deficient number, since it is larger than the sum of its proper divisors (1).

27000191 is an equidigital number, since it uses as much as digits as its factorization.

27000191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 27000191 is about 5196.1708016577. The cubic root of 27000191 is about 300.0007074057. Note that the first 3 decimals are identical.

The spelling of 27000191 in words is "twenty-seven million, one hundred ninety-one", and thus it is an aban number.