129988888105 has 8 divisors (see below), whose sum is σ = 157033557000. Its totient is φ = 103293182976.

The previous prime is 129988888103. The next prime is 129988888121. The reversal of 129988888105 is 501888889921.

It can be written as a sum of positive squares in 4 ways, for example, as 2522751529 + 127466136576 = 50227^2 + 357024^2 .

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 129988888105 - 2¹ = 129988888103 is a prime.

It is a super-2 number, since 2×129988888105² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129988888103) 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, 87240120 + ... + 87241609.

It is an arithmetic number, because the mean of its divisors is an integer number (19629194625).

Almost surely, 2^129988888105 is an apocalyptic number.

It is an amenable number.

129988888105 is a deficient number, since it is larger than the sum of its proper divisors (27044668895).

129988888105 is a wasteful number, since it uses less digits than its factorization.

129988888105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174481883.

The product of its (nonzero) digits is 26542080, while the sum is 67.

The spelling of 129988888105 in words is "one hundred twenty-nine billion, nine hundred eighty-eight million, eight hundred eighty-eight thousand, one hundred five".