27287431273 has 2 divisors, whose sum is σ = 27287431274. Its totient is φ = 27287431272.

The previous prime is 27287431271. The next prime is 27287431277. The reversal of 27287431273 is 37213478272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21833904169 + 5453527104 = 147763^2 + 73848^2 .

It is a cyclic number.

It is not a de Polignac number, because 27287431273 - 2¹ = 27287431271 is a prime.

Together with 27287431271, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (27287431271) 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, 13643715636 + 13643715637.

It is an arithmetic number, because the mean of its divisors is an integer number (13643715637).

Almost surely, 2^27287431273 is an apocalyptic number.

It is an amenable number.

27287431273 is a deficient number, since it is larger than the sum of its proper divisors (1).

27287431273 is an equidigital number, since it uses as much as digits as its factorization.

27287431273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 790272, while the sum is 46.

The spelling of 27287431273 in words is "twenty-seven billion, two hundred eighty-seven million, four hundred thirty-one thousand, two hundred seventy-three".