129724013971 has 8 divisors (see below), whose sum is σ = 131734156544. Its totient is φ = 127716046920.

The previous prime is 129724013927. The next prime is 129724014031. The reversal of 129724013971 is 179310427921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129724013971 - 2⁹ = 129724013459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129724011971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423495 + ... + 662416.

It is an arithmetic number, because the mean of its divisors is an integer number (16466769568).

Almost surely, 2^129724013971 is an apocalyptic number.

129724013971 is a deficient number, since it is larger than the sum of its proper divisors (2010142573).

129724013971 is a wasteful number, since it uses less digits than its factorization.

129724013971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087761.

The product of its (nonzero) digits is 190512, while the sum is 46.

The spelling of 129724013971 in words is "one hundred twenty-nine billion, seven hundred twenty-four million, thirteen thousand, nine hundred seventy-one".