129076929 has 32 divisors (see below), whose sum is σ = 194700800. Its totient is φ = 84505680.

The previous prime is 129076891. The next prime is 129076933. The reversal of 129076929 is 929670921.

It is not a de Polignac number, because 129076929 - 2⁹ = 129076417 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129076229) 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, 611634 + ... + 611844.

It is an arithmetic number, because the mean of its divisors is an integer number (6084400).

Almost surely, 2^129076929 is an apocalyptic number.

It is an amenable number.

129076929 is a deficient number, since it is larger than the sum of its proper divisors (65623871).

129076929 is a wasteful number, since it uses less digits than its factorization.

129076929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 129076929 is about 11361.2027972394. The cubic root of 129076929 is about 505.3778552985.

The spelling of 129076929 in words is "one hundred twenty-nine million, seventy-six thousand, nine hundred twenty-nine".