27797879 has 2 divisors, whose sum is σ = 27797880. Its totient is φ = 27797878.

The previous prime is 27797827. The next prime is 27797881. The reversal of 27797879 is 97879772.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27797879 is a prime.

Together with 27797881, 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 (27797579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13898939 + 13898940.

It is an arithmetic number, because the mean of its divisors is an integer number (13898940).

Almost surely, 2^27797879 is an apocalyptic number.

27797879 is a deficient number, since it is larger than the sum of its proper divisors (1).

27797879 is an equidigital number, since it uses as much as digits as its factorization.

27797879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3111696, while the sum is 56.

The square root of 27797879 is about 5272.3693914596. The cubic root of 27797879 is about 302.9264672141.

The spelling of 27797879 in words is "twenty-seven million, seven hundred ninety-seven thousand, eight hundred seventy-nine".