129926968829 has 4 divisors (see below), whose sum is σ = 148487964384. Its totient is φ = 111365973276.

The previous prime is 129926968811. The next prime is 129926968867. The reversal of 129926968829 is 928869629921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129926968829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129926968429) 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 in 3 ways as a sum of consecutive naturals, for example, 9280497767 + ... + 9280497780.

It is an arithmetic number, because the mean of its divisors is an integer number (37121991096).

Almost surely, 2^129926968829 is an apocalyptic number.

It is an amenable number.

129926968829 is a deficient number, since it is larger than the sum of its proper divisors (18560995555).

129926968829 is an equidigital number, since it uses as much as digits as its factorization.

129926968829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18560995554.

The product of its digits is 120932352, while the sum is 71.

The spelling of 129926968829 in words is "one hundred twenty-nine billion, nine hundred twenty-six million, nine hundred sixty-eight thousand, eight hundred twenty-nine".