129306205 has 8 divisors (see below), whose sum is σ = 177334272. Its totient is φ = 88667088.

The previous prime is 129306197. The next prime is 129306227. The reversal of 129306205 is 502603921.

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 129306205 - 2³ = 129306197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1847197 + ... + 1847266.

It is an arithmetic number, because the mean of its divisors is an integer number (22166784).

Almost surely, 2^129306205 is an apocalyptic number.

It is an amenable number.

129306205 is a deficient number, since it is larger than the sum of its proper divisors (48028067).

129306205 is an equidigital number, since it uses as much as digits as its factorization.

129306205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3694475.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 129306205 is about 11371.2886253054. The cubic root of 129306205 is about 505.6769081590.

The spelling of 129306205 in words is "one hundred twenty-nine million, three hundred six thousand, two hundred five".