129027805 has 8 divisors (see below), whose sum is σ = 155451744. Its totient is φ = 102810000.

The previous prime is 129027763. The next prime is 129027817. The reversal of 129027805 is 508720921.

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

It is a de Polignac number, because none of the positive numbers 2^k-129027805 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, 50151 + ... + 52660.

It is an arithmetic number, because the mean of its divisors is an integer number (19431468).

Almost surely, 2^129027805 is an apocalyptic number.

It is an amenable number.

129027805 is a deficient number, since it is larger than the sum of its proper divisors (26423939).

129027805 is a wasteful number, since it uses less digits than its factorization.

129027805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103067.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 129027805 is about 11359.0406725216. The cubic root of 129027805 is about 505.3137350562.

The spelling of 129027805 in words is "one hundred twenty-nine million, twenty-seven thousand, eight hundred five".