27163261 has 2 divisors, whose sum is σ = 27163262. Its totient is φ = 27163260.

The previous prime is 27163259. The next prime is 27163273. The reversal of 27163261 is 16236172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26071236 + 1092025 = 5106^2 + 1045^2 .

It is a cyclic number.

It is not a de Polignac number, because 27163261 - 2¹ = 27163259 is a prime.

Together with 27163259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27163231) 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, 13581630 + 13581631.

It is an arithmetic number, because the mean of its divisors is an integer number (13581631).

Almost surely, 2^27163261 is an apocalyptic number.

It is an amenable number.

27163261 is a deficient number, since it is larger than the sum of its proper divisors (1).

27163261 is an equidigital number, since it uses as much as digits as its factorization.

27163261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 28.

The square root of 27163261 is about 5211.8385431631. The cubic root of 27163261 is about 300.6034556939.

The spelling of 27163261 in words is "twenty-seven million, one hundred sixty-three thousand, two hundred sixty-one".