27381889 has 2 divisors, whose sum is σ = 27381890. Its totient is φ = 27381888.

The previous prime is 27381877. The next prime is 27381901. The reversal of 27381889 is 98818372.

It is a balanced prime because it is at equal distance from previous prime (27381877) and next prime (27381901).

It can be written as a sum of positive squares in only one way, i.e., 26863489 + 518400 = 5183^2 + 720^2 .

It is a cyclic number.

It is not a de Polignac number, because 27381889 - 2⁹ = 27381377 is a prime.

It is not a weakly prime, because it can be changed into another prime (27381859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13690944 + 13690945.

It is an arithmetic number, because the mean of its divisors is an integer number (13690945).

Almost surely, 2^27381889 is an apocalyptic number.

It is an amenable number.

27381889 is a deficient number, since it is larger than the sum of its proper divisors (1).

27381889 is an equidigital number, since it uses as much as digits as its factorization.

27381889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 46.

The square root of 27381889 is about 5232.7706810064. The cubic root of 27381889 is about 301.4077871546.

The spelling of 27381889 in words is "twenty-seven million, three hundred eighty-one thousand, eight hundred eighty-nine".