129308919 has 8 divisors (see below), whose sum is σ = 182553840. Its totient is φ = 81134976.

The previous prime is 129308897. The next prime is 129308929. The reversal of 129308919 is 919803921.

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

It is not a de Polignac number, because 129308919 - 2¹⁵ = 129276151 is a prime.

It is a super-2 number, since 2×129308919² = 33441593065897122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129308929) 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, 1267684 + ... + 1267785.

It is an arithmetic number, because the mean of its divisors is an integer number (22819230).

Almost surely, 2^129308919 is an apocalyptic number.

129308919 is a deficient number, since it is larger than the sum of its proper divisors (53244921).

129308919 is a wasteful number, since it uses less digits than its factorization.

129308919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2535489.

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 129308919 is about 11371.4079603187. The cubic root of 129308919 is about 505.6804460082.

The spelling of 129308919 in words is "one hundred twenty-nine million, three hundred eight thousand, nine hundred nineteen".