27079891 has 2 divisors, whose sum is σ = 27079892. Its totient is φ = 27079890.

The previous prime is 27079889. The next prime is 27079909. The reversal of 27079891 is 19897072.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27079891 - 2¹ = 27079889 is a prime.

Together with 27079889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (27079291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13539945 + 13539946.

It is an arithmetic number, because the mean of its divisors is an integer number (13539946).

Almost surely, 2^27079891 is an apocalyptic number.

27079891 is a deficient number, since it is larger than the sum of its proper divisors (1).

27079891 is an equidigital number, since it uses as much as digits as its factorization.

27079891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 27079891 is about 5203.8342594668. The cubic root of 27079891 is about 300.2956012300.

The spelling of 27079891 in words is "twenty-seven million, seventy-nine thousand, eight hundred ninety-one".