27108869 has 2 divisors, whose sum is σ = 27108870. Its totient is φ = 27108868.

The previous prime is 27108857. The next prime is 27108871. The reversal of 27108869 is 96880172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13786369 + 13322500 = 3713^2 + 3650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27108869 is a prime.

It is a super-2 number, since 2×27108869² = 1469781556918322, which contains 22 as substring.

Together with 27108871, 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 (27108899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13554434 + 13554435.

It is an arithmetic number, because the mean of its divisors is an integer number (13554435).

Almost surely, 2^27108869 is an apocalyptic number.

It is an amenable number.

27108869 is a deficient number, since it is larger than the sum of its proper divisors (1).

27108869 is an equidigital number, since it uses as much as digits as its factorization.

27108869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 27108869 is about 5206.6178081361. The cubic root of 27108869 is about 300.4026777787.

The spelling of 27108869 in words is "twenty-seven million, one hundred eight thousand, eight hundred sixty-nine".