129500706923 has 16 divisors (see below), whose sum is σ = 149825604096. Its totient is φ = 109632753600.

The previous prime is 129500706911. The next prime is 129500706941. The reversal of 129500706923 is 329607005921.

It is a cyclic number.

It is not a de Polignac number, because 129500706923 - 2³⁰ = 128426965099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129500706943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2197898 + ... + 2256048.

It is an arithmetic number, because the mean of its divisors is an integer number (9364100256).

Almost surely, 2^129500706923 is an apocalyptic number.

129500706923 is a deficient number, since it is larger than the sum of its proper divisors (20324897173).

129500706923 is an equidigital number, since it uses as much as digits as its factorization.

129500706923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62074.

The product of its (nonzero) digits is 204120, while the sum is 44.

The spelling of 129500706923 in words is "one hundred twenty-nine billion, five hundred million, seven hundred six thousand, nine hundred twenty-three".