27081617 has 2 divisors, whose sum is σ = 27081618. Its totient is φ = 27081616.

The previous prime is 27081611. The next prime is 27081619. The reversal of 27081617 is 71618072.

It is a Cunningham number, because it is equal to 5204²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27081616 + 1 = 5204^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 27081617 - 2⁶ = 27081553 is a prime.

Together with 27081619, 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 (27081611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13540808 + 13540809.

It is an arithmetic number, because the mean of its divisors is an integer number (13540809).

Almost surely, 2^27081617 is an apocalyptic number.

It is an amenable number.

27081617 is a deficient number, since it is larger than the sum of its proper divisors (1).

27081617 is an equidigital number, since it uses as much as digits as its factorization.

27081617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 27081617 is about 5204.0000960799. Note that the first 4 decimals coincide. The cubic root of 27081617 is about 300.3019811079.

Adding to 27081617 its reverse (71618072), we get a palindrome (98699689).

The spelling of 27081617 in words is "twenty-seven million, eighty-one thousand, six hundred seventeen".