129505413 has 16 divisors (see below), whose sum is σ = 177595200. Its totient is φ = 83909760.

The previous prime is 129505399. The next prime is 129505423. The reversal of 129505413 is 314505921.

It is not a de Polignac number, because 129505413 - 2⁹ = 129504901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129505423) 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, 11643 + ... + 19863.

It is an arithmetic number, because the mean of its divisors is an integer number (11099700).

Almost surely, 2^129505413 is an apocalyptic number.

It is an amenable number.

129505413 is a deficient number, since it is larger than the sum of its proper divisors (48089787).

129505413 is an equidigital number, since it uses as much as digits as its factorization.

129505413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8372.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 129505413 is about 11380.0445078216. The cubic root of 129505413 is about 505.9364553822.

The spelling of 129505413 in words is "one hundred twenty-nine million, five hundred five thousand, four hundred thirteen".