129839255185979 has 2 divisors, whose sum is σ = 129839255185980. Its totient is φ = 129839255185978.

The previous prime is 129839255185963. The next prime is 129839255186051. The reversal of 129839255185979 is 979581552938921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129839255185979 - 2⁴ = 129839255185963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129839255185897 and 129839255185906.

It is not a weakly prime, because it can be changed into another prime (129839255185919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64919627592989 + 64919627592990.

It is an arithmetic number, because the mean of its divisors is an integer number (64919627592990).

Almost surely, 2^{129839255185979} is an apocalyptic number.

129839255185979 is a deficient number, since it is larger than the sum of its proper divisors (1).

129839255185979 is an equidigital number, since it uses as much as digits as its factorization.

129839255185979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992000, while the sum is 83.

The spelling of 129839255185979 in words is "one hundred twenty-nine trillion, eight hundred thirty-nine billion, two hundred fifty-five million, one hundred eighty-five thousand, nine hundred seventy-nine".