129379873779 has 32 divisors (see below), whose sum is σ = 217282150400. Its totient is φ = 75427938720.

The previous prime is 129379873747. The next prime is 129379873807. The reversal of 129379873779 is 977378973921.

It is not a de Polignac number, because 129379873779 - 2⁵ = 129379873747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129379873279) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9693427 + ... + 9706764.

It is an arithmetic number, because the mean of its divisors is an integer number (6790067200).

Almost surely, 2^129379873779 is an apocalyptic number.

129379873779 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

129379873779 is a deficient number, since it is larger than the sum of its proper divisors (87902276621).

129379873779 is a wasteful number, since it uses less digits than its factorization.

129379873779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19400232 (or 19400226 counting only the distinct ones).

The product of its digits is 252047376, while the sum is 72.

The spelling of 129379873779 in words is "one hundred twenty-nine billion, three hundred seventy-nine million, eight hundred seventy-three thousand, seven hundred seventy-nine".