129503959 has 16 divisors (see below), whose sum is σ = 143865568. Its totient is φ = 115800192.

The previous prime is 129503939. The next prime is 129504013. The reversal of 129503959 is 959305921.

It is a cyclic number.

It is not a de Polignac number, because 129503959 - 2⁹ = 129503447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129503939) 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, 147229 + ... + 148105.

It is an arithmetic number, because the mean of its divisors is an integer number (8991598).

Almost surely, 2^129503959 is an apocalyptic number.

129503959 is a deficient number, since it is larger than the sum of its proper divisors (14361609).

129503959 is a wasteful number, since it uses less digits than its factorization.

129503959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234.

The product of its (nonzero) digits is 109350, while the sum is 43.

The square root of 129503959 is about 11379.9806238851. The cubic root of 129503959 is about 505.9345619366.

The spelling of 129503959 in words is "one hundred twenty-nine million, five hundred three thousand, nine hundred fifty-nine".