129515973 has 16 divisors (see below), whose sum is σ = 176760576. Its totient is φ = 84316160.

The previous prime is 129515927. The next prime is 129516017. The reversal of 129515973 is 379515921.

It is a cyclic number.

It is not a de Polignac number, because 129515973 - 2⁶ = 129515909 is a prime.

It is a super-3 number, since 3×129515973³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129515173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89665 + ... + 91097.

It is an arithmetic number, because the mean of its divisors is an integer number (11047536).

Almost surely, 2^129515973 is an apocalyptic number.

It is an amenable number.

129515973 is a deficient number, since it is larger than the sum of its proper divisors (47244603).

129515973 is a wasteful number, since it uses less digits than its factorization.

129515973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2124.

The product of its digits is 85050, while the sum is 42.

The square root of 129515973 is about 11380.5084684297. The cubic root of 129515973 is about 505.9502065288.

The spelling of 129515973 in words is "one hundred twenty-nine million, five hundred fifteen thousand, nine hundred seventy-three".