27105889 has 2 divisors, whose sum is σ = 27105890. Its totient is φ = 27105888.

The previous prime is 27105863. The next prime is 27105901. The reversal of 27105889 is 98850172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16974400 + 10131489 = 4120^2 + 3183^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27105889 is a prime.

It is equal to p_1689286 and since 27105889 and 1689286 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (27105809) 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, 13552944 + 13552945.

It is an arithmetic number, because the mean of its divisors is an integer number (13552945).

Almost surely, 2^27105889 is an apocalyptic number.

It is an amenable number.

27105889 is a deficient number, since it is larger than the sum of its proper divisors (1).

27105889 is an equidigital number, since it uses as much as digits as its factorization.

27105889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 27105889 is about 5206.3316260108. The cubic root of 27105889 is about 300.3916699079.

The spelling of 27105889 in words is "twenty-seven million, one hundred five thousand, eight hundred eighty-nine".