27911 has 8 divisors (see below), whose sum is σ = 31920. Its totient is φ = 24192.

The previous prime is 27901. The next prime is 27917. The reversal of 27911 is 11972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27911 - 2⁶ = 27847 is a prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 27911.

It is not an unprimeable number, because it can be changed into a prime (27917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191 + ... + 303.

It is an arithmetic number, because the mean of its divisors is an integer number (3990).

2²⁷⁹¹¹ is an apocalyptic number.

27911 is a deficient number, since it is larger than the sum of its proper divisors (4009).

27911 is a wasteful number, since it uses less digits than its factorization.

27911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145.

The product of its digits is 126, while the sum is 20.

The square root of 27911 is about 167.0658552787. The cubic root of 27911 is about 30.3336821868. Note that the first 3 decimals are identical.

The spelling of 27911 in words is "twenty-seven thousand, nine hundred eleven".