129438517 has 16 divisors (see below), whose sum is σ = 145861632. Its totient is φ = 114065280.

The previous prime is 129438497. The next prime is 129438539. The reversal of 129438517 is 715834921.

It is not a de Polignac number, because 129438517 - 2¹⁹ = 128914229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129438517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129432517) 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, 22468 + ... + 27634.

It is an arithmetic number, because the mean of its divisors is an integer number (9116352).

Almost surely, 2^129438517 is an apocalyptic number.

It is an amenable number.

129438517 is a deficient number, since it is larger than the sum of its proper divisors (16423115).

129438517 is a wasteful number, since it uses less digits than its factorization.

129438517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5268.

The product of its digits is 60480, while the sum is 40.

The square root of 129438517 is about 11377.1049480964. The cubic root of 129438517 is about 505.8493265805.

The spelling of 129438517 in words is "one hundred twenty-nine million, four hundred thirty-eight thousand, five hundred seventeen".