129171914 has 8 divisors (see below), whose sum is σ = 198264000. Its totient is φ = 63083916.

The previous prime is 129171869. The next prime is 129171923. The reversal of 129171914 is 419171921.

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

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, 750914 + ... + 751085.

It is an arithmetic number, because the mean of its divisors is an integer number (24783000).

Almost surely, 2^129171914 is an apocalyptic number.

129171914 is a deficient number, since it is larger than the sum of its proper divisors (69092086).

129171914 is a wasteful number, since it uses less digits than its factorization.

129171914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502044.

The product of its digits is 4536, while the sum is 35.

The square root of 129171914 is about 11365.3822636988. The cubic root of 129171914 is about 505.5017905514.

The spelling of 129171914 in words is "one hundred twenty-nine million, one hundred seventy-one thousand, nine hundred fourteen".