129278067277 has 2 divisors, whose sum is σ = 129278067278. Its totient is φ = 129278067276.

The previous prime is 129278067227. The next prime is 129278067287. The reversal of 129278067277 is 772760872921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86656051876 + 42622015401 = 294374^2 + 206451^2 .

It is an emirp because it is prime and its reverse (772760872921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129278067277 - 2¹¹ = 129278065229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129278067227) 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, 64639033638 + 64639033639.

It is an arithmetic number, because the mean of its divisors is an integer number (64639033639).

Almost surely, 2^129278067277 is an apocalyptic number.

It is an amenable number.

129278067277 is a deficient number, since it is larger than the sum of its proper divisors (1).

129278067277 is an equidigital number, since it uses as much as digits as its factorization.

129278067277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8297856, while the sum is 58.

The spelling of 129278067277 in words is "one hundred twenty-nine billion, two hundred seventy-eight million, sixty-seven thousand, two hundred seventy-seven".