129566613 has 16 divisors (see below), whose sum is σ = 196655616. Its totient is φ = 75110640.

The previous prime is 129566603. The next prime is 129566629. The reversal of 129566613 is 316665921.

It is not a de Polignac number, because 129566613 - 2¹⁰ = 129565589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129566603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84595 + ... + 86112.

It is an arithmetic number, because the mean of its divisors is an integer number (12290976).

Almost surely, 2^129566613 is an apocalyptic number.

It is an amenable number.

129566613 is a deficient number, since it is larger than the sum of its proper divisors (67089003).

129566613 is a wasteful number, since it uses less digits than its factorization.

129566613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170744.

The product of its digits is 58320, while the sum is 39.

The square root of 129566613 is about 11382.7331076504. The cubic root of 129566613 is about 506.0161391427.

The spelling of 129566613 in words is "one hundred twenty-nine million, five hundred sixty-six thousand, six hundred thirteen".