129139025029 has 32 divisors (see below), whose sum is σ = 164578176000. Its totient is φ = 98645610240.

The previous prime is 129139025021. The next prime is 129139025047. The reversal of 129139025029 is 920520931921.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 129139025029 - 2³ = 129139025021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129139025021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4732234 + ... + 4759444.

It is an arithmetic number, because the mean of its divisors is an integer number (5143068000).

Almost surely, 2^129139025029 is an apocalyptic number.

129139025029 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

129139025029 is a deficient number, since it is larger than the sum of its proper divisors (35439150971).

129139025029 is a wasteful number, since it uses less digits than its factorization.

129139025029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29353.

The product of its (nonzero) digits is 87480, while the sum is 43.

The spelling of 129139025029 in words is "one hundred twenty-nine billion, one hundred thirty-nine million, twenty-five thousand, twenty-nine".