27228979 has 2 divisors, whose sum is σ = 27228980. Its totient is φ = 27228978.

The previous prime is 27228959. The next prime is 27229021. The reversal of 27228979 is 97982272.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27228979 - 2⁵ = 27228947 is a prime.

It is not a weakly prime, because it can be changed into another prime (27228959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13614489 + 13614490.

It is an arithmetic number, because the mean of its divisors is an integer number (13614490).

Almost surely, 2^27228979 is an apocalyptic number.

27228979 is a deficient number, since it is larger than the sum of its proper divisors (1).

27228979 is an equidigital number, since it uses as much as digits as its factorization.

27228979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 46.

The square root of 27228979 is about 5218.1394193716. The cubic root of 27228979 is about 300.8456841911.

The spelling of 27228979 in words is "twenty-seven million, two hundred twenty-eight thousand, nine hundred seventy-nine".