129539885 has 8 divisors (see below), whose sum is σ = 155596896. Its totient is φ = 103532560.

The previous prime is 129539867. The next prime is 129539899. The reversal of 129539885 is 588935921.

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

It is not a de Polignac number, because 129539885 - 2¹² = 129535789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 6419 + ... + 17328.

It is an arithmetic number, because the mean of its divisors is an integer number (19449612).

Almost surely, 2^129539885 is an apocalyptic number.

It is an amenable number.

129539885 is a deficient number, since it is larger than the sum of its proper divisors (26057011).

129539885 is a wasteful number, since it uses less digits than its factorization.

129539885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24843.

The product of its digits is 777600, while the sum is 50.

The square root of 129539885 is about 11381.5589881176. The cubic root of 129539885 is about 505.9813417795.

The spelling of 129539885 in words is "one hundred twenty-nine million, five hundred thirty-nine thousand, eight hundred eighty-five".