27917 has 2 divisors, whose sum is σ = 27918. Its totient is φ = 27916.

The previous prime is 27901. The next prime is 27919. The reversal of 27917 is 71972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27556 + 361 = 166^2 + 19^2 .

It is a cyclic number.

It is not a de Polignac number, because 27917 - 2⁴ = 27901 is a prime.

Together with 27919, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13958 + 13959.

It is an arithmetic number, because the mean of its divisors is an integer number (13959).

2²⁷⁹¹⁷ is an apocalyptic number.

It is an amenable number.

27917 is a deficient number, since it is larger than the sum of its proper divisors (1).

27917 is an equidigital number, since it uses as much as digits as its factorization.

27917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 882, while the sum is 26.

The square root of 27917 is about 167.0838113044. The cubic root of 27917 is about 30.3358556316.

The spelling of 27917 in words is "twenty-seven thousand, nine hundred seventeen".