129765379 has 8 divisors (see below), whose sum is σ = 135770112. Its totient is φ = 123790920.

The previous prime is 129765373. The next prime is 129765407. The reversal of 129765379 is 973567921.

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 129765379 - 2³ = 129765371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129765371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1444 + ... + 16174.

It is an arithmetic number, because the mean of its divisors is an integer number (16971264).

Almost surely, 2^129765379 is an apocalyptic number.

129765379 is a deficient number, since it is larger than the sum of its proper divisors (6004733).

129765379 is a wasteful number, since it uses less digits than its factorization.

129765379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15137.

The product of its digits is 714420, while the sum is 49.

The square root of 129765379 is about 11391.4607930678. The cubic root of 129765379 is about 506.2747639362.

The spelling of 129765379 in words is "one hundred twenty-nine million, seven hundred sixty-five thousand, three hundred seventy-nine".