129883969945 has 8 divisors (see below), whose sum is σ = 157995843336. Its totient is φ = 102483789696.

The previous prime is 129883969909. The next prime is 129883969991. The reversal of 129883969945 is 549969388921.

It can be written as a sum of positive squares in 4 ways, for example, as 5180176 + 129878789769 = 2276^2 + 360387^2 .

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 129883969945 - 2³⁵ = 95524231577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (73).

It is a Duffinian number.

It is an unprimeable number.

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, 177922882 + ... + 177923611.

It is an arithmetic number, because the mean of its divisors is an integer number (19749480417).

Almost surely, 2^129883969945 is an apocalyptic number.

It is an amenable number.

129883969945 is a deficient number, since it is larger than the sum of its proper divisors (28111873391).

129883969945 is an equidigital number, since it uses as much as digits as its factorization.

129883969945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355846571.

The product of its digits is 302330880, while the sum is 73.

The spelling of 129883969945 in words is "one hundred twenty-nine billion, eight hundred eighty-three million, nine hundred sixty-nine thousand, nine hundred forty-five".