27816851 has 2 divisors, whose sum is σ = 27816852. Its totient is φ = 27816850.

The previous prime is 27816839. The next prime is 27816853. The reversal of 27816851 is 15861872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27816851 - 2¹⁴ = 27800467 is a prime.

Together with 27816853, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27816853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13908425 + 13908426.

It is an arithmetic number, because the mean of its divisors is an integer number (13908426).

Almost surely, 2^27816851 is an apocalyptic number.

27816851 is a deficient number, since it is larger than the sum of its proper divisors (1).

27816851 is an equidigital number, since it uses as much as digits as its factorization.

27816851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 38.

The square root of 27816851 is about 5274.1682756620. The cubic root of 27816851 is about 302.9953671226.

The spelling of 27816851 in words is "twenty-seven million, eight hundred sixteen thousand, eight hundred fifty-one".