129943378 has 8 divisors (see below), whose sum is σ = 194993280. Its totient is φ = 64945620.

The previous prime is 129943357. The next prime is 129943379. The reversal of 129943378 is 873349921.

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

It is not an unprimeable number, because it can be changed into a prime (129943379) 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, 6058 + ... + 17221.

It is an arithmetic number, because the mean of its divisors is an integer number (24374160).

Almost surely, 2^129943378 is an apocalyptic number.

129943378 is a deficient number, since it is larger than the sum of its proper divisors (65049902).

129943378 is a wasteful number, since it uses less digits than its factorization.

129943378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26072.

The product of its digits is 326592, while the sum is 46.

The square root of 129943378 is about 11399.2709415997. The cubic root of 129943378 is about 506.5061436503.

It can be divided in two parts, 129943 and 378, that added together give a 4-th power (130321 = 19⁴).

The spelling of 129943378 in words is "one hundred twenty-nine million, nine hundred forty-three thousand, three hundred seventy-eight".