27189161 has 2 divisors, whose sum is σ = 27189162. Its totient is φ = 27189160.

The previous prime is 27189143. The next prime is 27189221. The reversal of 27189161 is 16198172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24403600 + 2785561 = 4940^2 + 1669^2 .

It is a cyclic number.

It is not a de Polignac number, because 27189161 - 2²² = 22994857 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27189101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13594580 + 13594581.

It is an arithmetic number, because the mean of its divisors is an integer number (13594581).

Almost surely, 2^27189161 is an apocalyptic number.

It is an amenable number.

27189161 is a deficient number, since it is larger than the sum of its proper divisors (1).

27189161 is an equidigital number, since it uses as much as digits as its factorization.

27189161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 35.

The square root of 27189161 is about 5214.3226789296. The cubic root of 27189161 is about 300.6989665176.

The spelling of 27189161 in words is "twenty-seven million, one hundred eighty-nine thousand, one hundred sixty-one".