129383779 has 8 divisors (see below), whose sum is σ = 147962880. Its totient is φ = 110828616.

The previous prime is 129383777. The next prime is 129383789. The reversal of 129383779 is 977383921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129383779 - 2¹ = 129383777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129383777) 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 7 ways as a sum of consecutive naturals, for example, 7692 + ... + 17830.

It is an arithmetic number, because the mean of its divisors is an integer number (18495360).

Almost surely, 2^129383779 is an apocalyptic number.

129383779 is a deficient number, since it is larger than the sum of its proper divisors (18579101).

129383779 is a wasteful number, since it uses less digits than its factorization.

129383779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11969.

The product of its digits is 571536, while the sum is 49.

The square root of 129383779 is about 11374.6990729425. The cubic root of 129383779 is about 505.7780106509.

The spelling of 129383779 in words is "one hundred twenty-nine million, three hundred eighty-three thousand, seven hundred seventy-nine".