27899 has 4 divisors (see below), whose sum is σ = 29136. Its totient is φ = 26664.

The previous prime is 27893. The next prime is 27901. The reversal of 27899 is 99872.

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

It is a cyclic number.

It is not a de Polignac number, because 27899 - 2⁴ = 27883 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (27893) 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, 584 + ... + 629.

It is an arithmetic number, because the mean of its divisors is an integer number (7284).

2²⁷⁸⁹⁹ is an apocalyptic number.

27899 is a deficient number, since it is larger than the sum of its proper divisors (1237).

27899 is a wasteful number, since it uses less digits than its factorization.

27899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236.

The product of its digits is 9072, while the sum is 35.

The square root of 27899 is about 167.0299374364. The cubic root of 27899 is about 30.3293343626.

The spelling of 27899 in words is "twenty-seven thousand, eight hundred ninety-nine".