129518413 has 6 divisors (see below), whose sum is σ = 131373422. Its totient is φ = 127689240.

The previous prime is 129518357. The next prime is 129518423. The reversal of 129518413 is 314815921.

It can be written as a sum of positive squares in only one way, i.e., 125843524 + 3674889 = 11218^2 + 1917^2 .

It is not a de Polignac number, because 129518413 - 2¹⁷ = 129387341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129518423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7806 + ... + 17887.

Almost surely, 2^129518413 is an apocalyptic number.

It is an amenable number.

129518413 is a deficient number, since it is larger than the sum of its proper divisors (1855009).

129518413 is an frugal number, since it uses more digits than its factorization.

129518413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25835 (or 25764 counting only the distinct ones).

The product of its digits is 8640, while the sum is 34.

The square root of 129518413 is about 11380.6156687589. The cubic root of 129518413 is about 505.9533837707.

The spelling of 129518413 in words is "one hundred twenty-nine million, five hundred eighteen thousand, four hundred thirteen".