129970009 has 8 divisors (see below), whose sum is σ = 141412040. Its totient is φ = 118734336.

The previous prime is 129969943. The next prime is 129970019. The reversal of 129970009 is 900079921.

It can be written as a sum of positive squares in 4 ways, for example, as 17015625 + 112954384 = 4125^2 + 10628^2 .

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 129970009 - 2¹³ = 129961817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129970009.

It is not an unprimeable number, because it can be changed into a prime (129970019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50274 + ... + 52795.

It is an arithmetic number, because the mean of its divisors is an integer number (17676505).

Almost surely, 2^129970009 is an apocalyptic number.

It is an amenable number.

129970009 is a deficient number, since it is larger than the sum of its proper divisors (11442031).

129970009 is a wasteful number, since it uses less digits than its factorization.

129970009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103179.

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 129970009 is about 11400.4389827761. The cubic root of 129970009 is about 506.5407429349.

The spelling of 129970009 in words is "one hundred twenty-nine million, nine hundred seventy thousand, nine".