27939187 has 2 divisors, whose sum is σ = 27939188. Its totient is φ = 27939186.

The previous prime is 27939179. The next prime is 27939221. The reversal of 27939187 is 78193972.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27939187 - 2³ = 27939179 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27939127) 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, 13969593 + 13969594.

It is an arithmetic number, because the mean of its divisors is an integer number (13969594).

Almost surely, 2^27939187 is an apocalyptic number.

27939187 is a deficient number, since it is larger than the sum of its proper divisors (1).

27939187 is an equidigital number, since it uses as much as digits as its factorization.

27939187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 46.

The square root of 27939187 is about 5285.7532102814. The cubic root of 27939187 is about 303.4388996436.

The spelling of 27939187 in words is "twenty-seven million, nine hundred thirty-nine thousand, one hundred eighty-seven".