129907500073 has 4 divisors (see below), whose sum is σ = 139900384708. Its totient is φ = 119914615440.

The previous prime is 129907500059. The next prime is 129907500143. The reversal of 129907500073 is 370005709921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 370005709921 = 59 ⋅6271283219.

It can be written as a sum of positive squares in 2 ways, for example, as 29045362329 + 100862137744 = 170427^2 + 317588^2 .

It is a cyclic number.

It is not a de Polignac number, because 129907500073 - 2¹³ = 129907491881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129907500013) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4996442298 + ... + 4996442323.

It is an arithmetic number, because the mean of its divisors is an integer number (34975096177).

Almost surely, 2^129907500073 is an apocalyptic number.

129907500073 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

129907500073 is a deficient number, since it is larger than the sum of its proper divisors (9992884635).

129907500073 is an equidigital number, since it uses as much as digits as its factorization.

129907500073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9992884634.

The product of its (nonzero) digits is 119070, while the sum is 43.

The spelling of 129907500073 in words is "one hundred twenty-nine billion, nine hundred seven million, five hundred thousand, seventy-three".