129473709 has 16 divisors (see below), whose sum is σ = 174182400. Its totient is φ = 85544816.

The previous prime is 129473651. The next prime is 129473711. The reversal of 129473709 is 907374921.

It is a cyclic number.

It is not a de Polignac number, because 129473709 - 2¹⁹ = 128949421 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129473779) 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, 257152 + ... + 257654.

It is an arithmetic number, because the mean of its divisors is an integer number (10886400).

Almost surely, 2^129473709 is an apocalyptic number.

It is an amenable number.

129473709 is a deficient number, since it is larger than the sum of its proper divisors (44708691).

129473709 is a wasteful number, since it uses less digits than its factorization.

129473709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104.

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 129473709 is about 11378.6514578838. The cubic root of 129473709 is about 505.8951661982.

The spelling of 129473709 in words is "one hundred twenty-nine million, four hundred seventy-three thousand, seven hundred nine".