129731433307 has 4 divisors (see below), whose sum is σ = 148264495216. Its totient is φ = 111198371400.

The previous prime is 129731433257. The next prime is 129731433317. The reversal of 129731433307 is 703334137921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129731433307 - 2⁷ = 129731433179 is a prime.

It is the 360183-rd Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129731433317) by changing a digit.

It is a nontrivial repunit in base 360182.

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, 9266530944 + ... + 9266530957.

It is an arithmetic number, because the mean of its divisors is an integer number (37066123804).

Almost surely, 2^129731433307 is an apocalyptic number.

129731433307 is a deficient number, since it is larger than the sum of its proper divisors (18533061909).

129731433307 is an equidigital number, since it uses as much as digits as its factorization.

129731433307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18533061908.

The product of its (nonzero) digits is 285768, while the sum is 43.

The spelling of 129731433307 in words is "one hundred twenty-nine billion, seven hundred thirty-one million, four hundred thirty-three thousand, three hundred seven".