27889427 has 2 divisors, whose sum is σ = 27889428. Its totient is φ = 27889426.

The previous prime is 27889399. The next prime is 27889441. The reversal of 27889427 is 72498872.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27889427 - 2²² = 23695123 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27889457) 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, 13944713 + 13944714.

It is an arithmetic number, because the mean of its divisors is an integer number (13944714).

Almost surely, 2^27889427 is an apocalyptic number.

27889427 is a deficient number, since it is larger than the sum of its proper divisors (1).

27889427 is an equidigital number, since it uses as much as digits as its factorization.

27889427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 47.

The square root of 27889427 is about 5281.0441202474. The cubic root of 27889427 is about 303.2586499174.

The spelling of 27889427 in words is "twenty-seven million, eight hundred eighty-nine thousand, four hundred twenty-seven".