129940179 has 8 divisors (see below), whose sum is σ = 180786432. Its totient is φ = 82860360.

The previous prime is 129940171. The next prime is 129940247. The reversal of 129940179 is 971049921.

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

It is not a de Polignac number, because 129940179 - 2³ = 129940171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129940179.

It is not an unprimeable number, because it can be changed into a prime (129940171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 941527 + ... + 941664.

It is an arithmetic number, because the mean of its divisors is an integer number (22598304).

Almost surely, 2^129940179 is an apocalyptic number.

129940179 is a deficient number, since it is larger than the sum of its proper divisors (50846253).

129940179 is a wasteful number, since it uses less digits than its factorization.

129940179 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883217.

The product of its (nonzero) digits is 40824, while the sum is 42.

The square root of 129940179 is about 11399.1306247450. The cubic root of 129940179 is about 506.5019871568.

The spelling of 129940179 in words is "one hundred twenty-nine million, nine hundred forty thousand, one hundred seventy-nine".