129995127329 has 2 divisors, whose sum is σ = 129995127330. Its totient is φ = 129995127328.

The previous prime is 129995127289. The next prime is 129995127347. The reversal of 129995127329 is 923721599921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80912940304 + 49082187025 = 284452^2 + 221545^2 .

It is a cyclic number.

It is not a de Polignac number, because 129995127329 - 2¹⁶ = 129995061793 is a prime.

It is not a weakly prime, because it can be changed into another prime (129995127359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64997563664 + 64997563665.

It is an arithmetic number, because the mean of its divisors is an integer number (64997563665).

Almost surely, 2^129995127329 is an apocalyptic number.

It is an amenable number.

129995127329 is a deficient number, since it is larger than the sum of its proper divisors (1).

129995127329 is an equidigital number, since it uses as much as digits as its factorization.

129995127329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5511240, while the sum is 59.

The spelling of 129995127329 in words is "one hundred twenty-nine billion, nine hundred ninety-five million, one hundred twenty-seven thousand, three hundred twenty-nine".