27894991 has 2 divisors, whose sum is σ = 27894992. Its totient is φ = 27894990.

The previous prime is 27894989. The next prime is 27895001. The reversal of 27894991 is 19949872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27894991 - 2¹ = 27894989 is a prime.

Together with 27894989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27894901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13947495 + 13947496.

It is an arithmetic number, because the mean of its divisors is an integer number (13947496).

Almost surely, 2^27894991 is an apocalyptic number.

27894991 is a deficient number, since it is larger than the sum of its proper divisors (1).

27894991 is an equidigital number, since it uses as much as digits as its factorization.

27894991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 49.

The square root of 27894991 is about 5281.5708837428. The cubic root of 27894991 is about 303.2788154916.

The spelling of 27894991 in words is "twenty-seven million, eight hundred ninety-four thousand, nine hundred ninety-one".