27136181 has 2 divisors, whose sum is σ = 27136182. Its totient is φ = 27136180.

The previous prime is 27136177. The next prime is 27136183. The reversal of 27136181 is 18163172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27133681 + 2500 = 5209^2 + 50^2 .

It is a cyclic number.

It is not a de Polignac number, because 27136181 - 2² = 27136177 is a prime.

It is a super-2 number, since 2×27136181² = 1472744638529522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 27136183, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27136183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13568090 + 13568091.

It is an arithmetic number, because the mean of its divisors is an integer number (13568091).

Almost surely, 2^27136181 is an apocalyptic number.

It is an amenable number.

27136181 is a deficient number, since it is larger than the sum of its proper divisors (1).

27136181 is an equidigital number, since it uses as much as digits as its factorization.

27136181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 29.

The square root of 27136181 is about 5209.2399637567. The cubic root of 27136181 is about 300.5035284649.

The spelling of 27136181 in words is "twenty-seven million, one hundred thirty-six thousand, one hundred eighty-one".