129402717 has 8 divisors (see below), whose sum is σ = 173854560. Its totient is φ = 85609680.

The previous prime is 129402709. The next prime is 129402737. The reversal of 129402717 is 717204921.

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

It is not a de Polignac number, because 129402717 - 2³ = 129402709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129402737) 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, 164242 + ... + 165027.

It is an arithmetic number, because the mean of its divisors is an integer number (21731820).

Almost surely, 2^129402717 is an apocalyptic number.

It is an amenable number.

129402717 is a deficient number, since it is larger than the sum of its proper divisors (44451843).

129402717 is a wasteful number, since it uses less digits than its factorization.

129402717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329403.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 129402717 is about 11375.5315040661. The cubic root of 129402717 is about 505.8026864815.

The spelling of 129402717 in words is "one hundred twenty-nine million, four hundred two thousand, seven hundred seventeen".