129599129 has 8 divisors (see below), whose sum is σ = 141845088. Its totient is φ = 117430560.

The previous prime is 129599111. The next prime is 129599131. The reversal of 129599129 is 921995921.

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

It is a cyclic number.

It is not a de Polignac number, because 129599129 - 2²⁰ = 128550553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129599329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15812 + ... + 22565.

It is an arithmetic number, because the mean of its divisors is an integer number (17730636).

Almost surely, 2^129599129 is an apocalyptic number.

It is an amenable number.

129599129 is a deficient number, since it is larger than the sum of its proper divisors (12245959).

129599129 is a wasteful number, since it uses less digits than its factorization.

129599129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38695.

The product of its digits is 131220, while the sum is 47.

The square root of 129599129 is about 11384.1613217663. The cubic root of 129599129 is about 506.0584654905.

The spelling of 129599129 in words is "one hundred twenty-nine million, five hundred ninety-nine thousand, one hundred twenty-nine".