27281329 has 2 divisors, whose sum is σ = 27281330. Its totient is φ = 27281328.

The previous prime is 27281327. The next prime is 27281339. The reversal of 27281329 is 92318272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27279729 + 1600 = 5223^2 + 40^2 .

It is a cyclic number.

It is not a de Polignac number, because 27281329 - 2¹ = 27281327 is a prime.

Together with 27281327, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 27281294 and 27281303.

It is not a weakly prime, because it can be changed into another prime (27281323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13640664 + 13640665.

It is an arithmetic number, because the mean of its divisors is an integer number (13640665).

Almost surely, 2^27281329 is an apocalyptic number.

It is an amenable number.

27281329 is a deficient number, since it is larger than the sum of its proper divisors (1).

27281329 is an equidigital number, since it uses as much as digits as its factorization.

27281329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 34.

The square root of 27281329 is about 5223.1531664312. The cubic root of 27281329 is about 301.0383611333.

The spelling of 27281329 in words is "twenty-seven million, two hundred eighty-one thousand, three hundred twenty-nine".