27181361 has 2 divisors, whose sum is σ = 27181362. Its totient is φ = 27181360.

The previous prime is 27181339. The next prime is 27181373. The reversal of 27181361 is 16318172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20421361 + 6760000 = 4519^2 + 2600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27181361 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27181061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13590680 + 13590681.

It is an arithmetic number, because the mean of its divisors is an integer number (13590681).

Almost surely, 2^27181361 is an apocalyptic number.

It is an amenable number.

27181361 is a deficient number, since it is larger than the sum of its proper divisors (1).

27181361 is an equidigital number, since it uses as much as digits as its factorization.

27181361 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 27181361 is about 5213.5746853766. The cubic root of 27181361 is about 300.6702090253.

The spelling of 27181361 in words is "twenty-seven million, one hundred eighty-one thousand, three hundred sixty-one".