27806047 has 2 divisors, whose sum is σ = 27806048. Its totient is φ = 27806046.

The previous prime is 27806029. The next prime is 27806069. The reversal of 27806047 is 74060872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27806047 - 2¹¹ = 27803999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27806027) 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, 13903023 + 13903024.

It is an arithmetic number, because the mean of its divisors is an integer number (13903024).

Almost surely, 2^27806047 is an apocalyptic number.

27806047 is a deficient number, since it is larger than the sum of its proper divisors (1).

27806047 is an equidigital number, since it uses as much as digits as its factorization.

27806047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 27806047 is about 5273.1439388661. The cubic root of 27806047 is about 302.9561344785.

The spelling of 27806047 in words is "twenty-seven million, eight hundred six thousand, forty-seven".