27147917 has 2 divisors, whose sum is σ = 27147918. Its totient is φ = 27147916.

The previous prime is 27147859. The next prime is 27147919. The reversal of 27147917 is 71974172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15217801 + 11930116 = 3901^2 + 3454^2 .

It is a cyclic number.

It is not a de Polignac number, because 27147917 - 2⁶ = 27147853 is a prime.

Together with 27147919, 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 (27147919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13573958 + 13573959.

It is an arithmetic number, because the mean of its divisors is an integer number (13573959).

Almost surely, 2^27147917 is an apocalyptic number.

It is an amenable number.

27147917 is a deficient number, since it is larger than the sum of its proper divisors (1).

27147917 is an equidigital number, since it uses as much as digits as its factorization.

27147917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24696, while the sum is 38.

The square root of 27147917 is about 5210.3663019024. The cubic root of 27147917 is about 300.5468433429.

The spelling of 27147917 in words is "twenty-seven million, one hundred forty-seven thousand, nine hundred seventeen".