27117217 has 2 divisors, whose sum is σ = 27117218. Its totient is φ = 27117216.

The previous prime is 27117203. The next prime is 27117221. The reversal of 27117217 is 71271172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27029601 + 87616 = 5199^2 + 296^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27117217 is a prime.

It is not a weakly prime, because it can be changed into another prime (27117257) 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, 13558608 + 13558609.

It is an arithmetic number, because the mean of its divisors is an integer number (13558609).

Almost surely, 2^27117217 is an apocalyptic number.

It is an amenable number.

27117217 is a deficient number, since it is larger than the sum of its proper divisors (1).

27117217 is an equidigital number, since it uses as much as digits as its factorization.

27117217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1372, while the sum is 28.

The square root of 27117217 is about 5207.4194184836. The cubic root of 27117217 is about 300.4335102980.

Adding to 27117217 its reverse (71271172), we get a palindrome (98388389).

The spelling of 27117217 in words is "twenty-seven million, one hundred seventeen thousand, two hundred seventeen".