27985673 has 2 divisors, whose sum is σ = 27985674. Its totient is φ = 27985672.

The previous prime is 27985669. The next prime is 27985679. The reversal of 27985673 is 37658972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27426169 + 559504 = 5237^2 + 748^2 .

It is a cyclic number.

It is not a de Polignac number, because 27985673 - 2² = 27985669 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (27985679) 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, 13992836 + 13992837.

It is an arithmetic number, because the mean of its divisors is an integer number (13992837).

Almost surely, 2^27985673 is an apocalyptic number.

It is an amenable number.

27985673 is a deficient number, since it is larger than the sum of its proper divisors (1).

27985673 is an equidigital number, since it uses as much as digits as its factorization.

27985673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 47.

The square root of 27985673 is about 5290.1486746593. The cubic root of 27985673 is about 303.6070964345.

The spelling of 27985673 in words is "twenty-seven million, nine hundred eighty-five thousand, six hundred seventy-three".