27779 has 2 divisors, whose sum is σ = 27780. Its totient is φ = 27778.

The previous prime is 27773. The next prime is 27791. The reversal of 27779 is 97772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27779 - 2⁴ = 27763 is a prime.

It is a Chen prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (27773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13889 + 13890.

It is an arithmetic number, because the mean of its divisors is an integer number (13890).

2²⁷⁷⁷⁹ is an apocalyptic number.

27779 is a deficient number, since it is larger than the sum of its proper divisors (1).

27779 is an equidigital number, since it uses as much as digits as its factorization.

27779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6174, while the sum is 32.

The square root of 27779 is about 166.6703332930. The cubic root of 27779 is about 30.2857873924.

The spelling of 27779 in words is "twenty-seven thousand, seven hundred seventy-nine".