129383426 has 8 divisors (see below), whose sum is σ = 204289680. Its totient is φ = 61286868.

The previous prime is 129383411. The next prime is 129383453. The reversal of 129383426 is 624383921.

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

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 3404827 = 129383426 / (1 + 2 + 9 + 3 + 8 + 3 + 4 + 2 + 6).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 129383426.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1702376 + ... + 1702451.

It is an arithmetic number, because the mean of its divisors is an integer number (25536210).

Almost surely, 2^129383426 is an apocalyptic number.

129383426 is a deficient number, since it is larger than the sum of its proper divisors (74906254).

129383426 is a wasteful number, since it uses less digits than its factorization.

129383426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3404848.

The product of its digits is 62208, while the sum is 38.

The square root of 129383426 is about 11374.6835560379. The cubic root of 129383426 is about 505.7775506761. Note that the first 3 decimals are identical.

The spelling of 129383426 in words is "one hundred twenty-nine million, three hundred eighty-three thousand, four hundred twenty-six".