27943 has 2 divisors, whose sum is σ = 27944. Its totient is φ = 27942.

The previous prime is 27941. The next prime is 27947. The reversal of 27943 is 34972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27943 - 2¹ = 27941 is a prime.

It is a super-2 number, since 2×27943² = 1561622498, which contains 22 as substring.

Together with 27941, it forms a pair of twin primes.

It is a nialpdrome in base 6.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13971 + 13972.

It is an arithmetic number, because the mean of its divisors is an integer number (13972).

2²⁷⁹⁴³ is an apocalyptic number.

27943 is a deficient number, since it is larger than the sum of its proper divisors (1).

27943 is an equidigital number, since it uses as much as digits as its factorization.

27943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 25.

The square root of 27943 is about 167.1615984609. The cubic root of 27943 is about 30.3452702955.

The spelling of 27943 in words is "twenty-seven thousand, nine hundred forty-three".