27656791 has 2 divisors, whose sum is σ = 27656792. Its totient is φ = 27656790.

The previous prime is 27656789. The next prime is 27656801. The reversal of 27656791 is 19765672.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27656791 - 2¹ = 27656789 is a prime.

Together with 27656789, 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 (27656711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13828395 + 13828396.

It is an arithmetic number, because the mean of its divisors is an integer number (13828396).

Almost surely, 2^27656791 is an apocalyptic number.

27656791 is a deficient number, since it is larger than the sum of its proper divisors (1).

27656791 is an equidigital number, since it uses as much as digits as its factorization.

27656791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 43.

The square root of 27656791 is about 5258.9724281460. The cubic root of 27656791 is about 302.4130970912.

The spelling of 27656791 in words is "twenty-seven million, six hundred fifty-six thousand, seven hundred ninety-one".