27128443 has 2 divisors, whose sum is σ = 27128444. Its totient is φ = 27128442.

The previous prime is 27128419. The next prime is 27128473. The reversal of 27128443 is 34482172.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27128443 - 2⁵ = 27128411 is a prime.

It is equal to p_1690591 and since 27128443 and 1690591 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 (27128473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13564221 + 13564222.

It is an arithmetic number, because the mean of its divisors is an integer number (13564222).

Almost surely, 2^27128443 is an apocalyptic number.

27128443 is a deficient number, since it is larger than the sum of its proper divisors (1).

27128443 is an equidigital number, since it uses as much as digits as its factorization.

27128443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 31.

The square root of 27128443 is about 5208.4971920891. The cubic root of 27128443 is about 300.4749624535.

The spelling of 27128443 in words is "twenty-seven million, one hundred twenty-eight thousand, four hundred forty-three".