27389 has 4 divisors (see below), whose sum is σ = 27900. Its totient is φ = 26880.

The previous prime is 27367. The next prime is 27397. The reversal of 27389 is 98372.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7225 + 20164 = 85^2 + 142^2 .

It is a cyclic number.

It is not a de Polignac number, because 27389 - 2¹² = 23293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164 + ... + 285.

It is an arithmetic number, because the mean of its divisors is an integer number (6975).

2²⁷³⁸⁹ is an apocalyptic number.

It is an amenable number.

27389 is a deficient number, since it is larger than the sum of its proper divisors (511).

27389 is an equidigital number, since it uses as much as digits as its factorization.

27389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510.

The product of its digits is 3024, while the sum is 29.

The square root of 27389 is about 165.4962235219. The cubic root of 27389 is about 30.1433876483.

It can be divided in two parts, 2738 and 9, that multiplied together give a palindrome (24642).

The spelling of 27389 in words is "twenty-seven thousand, three hundred eighty-nine".