129516009 has 8 divisors (see below), whose sum is σ = 197357760. Its totient is φ = 74009136.

The previous prime is 129515927. The next prime is 129516017. The reversal of 129516009 is 900615921.

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

It is not a de Polignac number, because 129516009 - 2¹³ = 129507817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129516029) 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, 3083694 + ... + 3083735.

It is an arithmetic number, because the mean of its divisors is an integer number (24669720).

Almost surely, 2^129516009 is an apocalyptic number.

It is an amenable number.

129516009 is a deficient number, since it is larger than the sum of its proper divisors (67841751).

129516009 is an equidigital number, since it uses as much as digits as its factorization.

129516009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6167439.

The product of its (nonzero) digits is 4860, while the sum is 33.

The square root of 129516009 is about 11380.5100500812. The cubic root of 129516009 is about 505.9502534064.

The spelling of 129516009 in words is "one hundred twenty-nine million, five hundred sixteen thousand, nine".