27327991 has 2 divisors, whose sum is σ = 27327992. Its totient is φ = 27327990.

The previous prime is 27327983. The next prime is 27327997. The reversal of 27327991 is 19972372.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27327991 - 2³ = 27327983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27327997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13663995 + 13663996.

It is an arithmetic number, because the mean of its divisors is an integer number (13663996).

Almost surely, 2^27327991 is an apocalyptic number.

27327991 is a deficient number, since it is larger than the sum of its proper divisors (1).

27327991 is an equidigital number, since it uses as much as digits as its factorization.

27327991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 40.

The square root of 27327991 is about 5227.6181000528. The cubic root of 27327991 is about 301.2098954320.

The spelling of 27327991 in words is "twenty-seven million, three hundred twenty-seven thousand, nine hundred ninety-one".