27933979 has 2 divisors, whose sum is σ = 27933980. Its totient is φ = 27933978.

The previous prime is 27933977. The next prime is 27933991. The reversal of 27933979 is 97933972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27933979 - 2¹ = 27933977 is a prime.

Together with 27933977, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27933973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13966989 + 13966990.

It is an arithmetic number, because the mean of its divisors is an integer number (13966990).

Almost surely, 2^27933979 is an apocalyptic number.

27933979 is a deficient number, since it is larger than the sum of its proper divisors (1).

27933979 is an equidigital number, since it uses as much as digits as its factorization.

27933979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 642978, while the sum is 49.

The square root of 27933979 is about 5285.2605423006. The cubic root of 27933979 is about 303.4200443110.

The spelling of 27933979 in words is "twenty-seven million, nine hundred thirty-three thousand, nine hundred seventy-nine".