127892991529 has 2 divisors, whose sum is σ = 127892991530. Its totient is φ = 127892991528.

The previous prime is 127892991511. The next prime is 127892991571. The reversal of 127892991529 is 925199298721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92886581529 + 35006410000 = 304773^2 + 187100^2 .

It is an emirp because it is prime and its reverse (925199298721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127892991529 - 2⁵ = 127892991497 is a prime.

It is not a weakly prime, because it can be changed into another prime (127892992529) 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, 63946495764 + 63946495765.

It is an arithmetic number, because the mean of its divisors is an integer number (63946495765).

Almost surely, 2^127892991529 is an apocalyptic number.

It is an amenable number.

127892991529 is a deficient number, since it is larger than the sum of its proper divisors (1).

127892991529 is an equidigital number, since it uses as much as digits as its factorization.

127892991529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14696640, while the sum is 64.

The spelling of 127892991529 in words is "one hundred twenty-seven billion, eight hundred ninety-two million, nine hundred ninety-one thousand, five hundred twenty-nine".