129391817099 has 8 divisors (see below), whose sum is σ = 129726870000. Its totient is φ = 129056856192.

The previous prime is 129391817083. The next prime is 129391817153. The reversal of 129391817099 is 990718193921.

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 129391817099 - 2⁴ = 129391817083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129391817029) 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, 3473927 + ... + 3510975.

It is an arithmetic number, because the mean of its divisors is an integer number (16215858750).

Almost surely, 2^129391817099 is an apocalyptic number.

129391817099 is a deficient number, since it is larger than the sum of its proper divisors (335052901).

129391817099 is an equidigital number, since it uses as much as digits as its factorization.

129391817099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45997.

The product of its (nonzero) digits is 2204496, while the sum is 59.

The spelling of 129391817099 in words is "one hundred twenty-nine billion, three hundred ninety-one million, eight hundred seventeen thousand, ninety-nine".