27189784273 has 2 divisors, whose sum is σ = 27189784274. Its totient is φ = 27189784272.

The previous prime is 27189784199. The next prime is 27189784289. The reversal of 27189784273 is 37248798172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19048692289 + 8141091984 = 138017^2 + 90228^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27189784273 is a prime.

It is not a weakly prime, because it can be changed into another prime (27189884273) 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, 13594892136 + 13594892137.

It is an arithmetic number, because the mean of its divisors is an integer number (13594892137).

Almost surely, 2^27189784273 is an apocalyptic number.

It is an amenable number.

27189784273 is a deficient number, since it is larger than the sum of its proper divisors (1).

27189784273 is an equidigital number, since it uses as much as digits as its factorization.

27189784273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9483264, while the sum is 58.

The spelling of 27189784273 in words is "twenty-seven billion, one hundred eighty-nine million, seven hundred eighty-four thousand, two hundred seventy-three".