27808117 has 2 divisors, whose sum is σ = 27808118. Its totient is φ = 27808116.

The previous prime is 27808111. The next prime is 27808133. The reversal of 27808117 is 71180872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20196036 + 7612081 = 4494^2 + 2759^2 .

It is a cyclic number.

It is not a de Polignac number, because 27808117 - 2¹¹ = 27806069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27808111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13904058 + 13904059.

It is an arithmetic number, because the mean of its divisors is an integer number (13904059).

Almost surely, 2^27808117 is an apocalyptic number.

It is an amenable number.

27808117 is a deficient number, since it is larger than the sum of its proper divisors (1).

27808117 is an equidigital number, since it uses as much as digits as its factorization.

27808117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6272, while the sum is 34.

The square root of 27808117 is about 5273.3402128063. The cubic root of 27808117 is about 302.9636520715.

Adding to 27808117 its reverse (71180872), we get a palindrome (98988989).

The spelling of 27808117 in words is "twenty-seven million, eight hundred eight thousand, one hundred seventeen".