27687043273 has 2 divisors, whose sum is σ = 27687043274. Its totient is φ = 27687043272.

The previous prime is 27687043259. The next prime is 27687043283. The reversal of 27687043273 is 37234078672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24276132864 + 3410910409 = 155808^2 + 58403^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27687043273 is a prime.

It is not a weakly prime, because it can be changed into another prime (27687043213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13843521636 + 13843521637.

It is an arithmetic number, because the mean of its divisors is an integer number (13843521637).

Almost surely, 2^27687043273 is an apocalyptic number.

It is an amenable number.

27687043273 is a deficient number, since it is larger than the sum of its proper divisors (1).

27687043273 is an equidigital number, since it uses as much as digits as its factorization.

27687043273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2370816, while the sum is 49.

The spelling of 27687043273 in words is "twenty-seven billion, six hundred eighty-seven million, forty-three thousand, two hundred seventy-three".