27127979 has 2 divisors, whose sum is σ = 27127980. Its totient is φ = 27127978.

The previous prime is 27127973. The next prime is 27128011. The reversal of 27127979 is 97972172.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27127979 is a prime.

It is not a weakly prime, because it can be changed into another prime (27127973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13563989 + 13563990.

It is an arithmetic number, because the mean of its divisors is an integer number (13563990).

Almost surely, 2^27127979 is an apocalyptic number.

27127979 is a deficient number, since it is larger than the sum of its proper divisors (1).

27127979 is an equidigital number, since it uses as much as digits as its factorization.

27127979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 111132, while the sum is 44.

The square root of 27127979 is about 5208.4526493000. The cubic root of 27127979 is about 300.4732493539.

The spelling of 27127979 in words is "twenty-seven million, one hundred twenty-seven thousand, nine hundred seventy-nine".