129071723 has 8 divisors (see below), whose sum is σ = 142502976. Its totient is φ = 115923400.

The previous prime is 129071659. The next prime is 129071737. The reversal of 129071723 is 327170921.

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 129071723 - 2⁶ = 129071659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129071723.

It is not an unprimeable number, because it can be changed into a prime (129071753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69773 + ... + 71598.

It is an arithmetic number, because the mean of its divisors is an integer number (17812872).

Almost surely, 2^129071723 is an apocalyptic number.

129071723 is a deficient number, since it is larger than the sum of its proper divisors (13431253).

129071723 is a wasteful number, since it uses less digits than its factorization.

129071723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141465.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 129071723 is about 11360.9736818637. The cubic root of 129071723 is about 505.3710608168.

The spelling of 129071723 in words is "one hundred twenty-nine million, seventy-one thousand, seven hundred twenty-three".