129016657 has 24 divisors (see below), whose sum is σ = 166540320. Its totient is φ = 98804160.

The previous prime is 129016649. The next prime is 129016661. The reversal of 129016657 is 756610921.

It is not a de Polignac number, because 129016657 - 2³ = 129016649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129016697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29773 + ... + 33829.

It is an arithmetic number, because the mean of its divisors is an integer number (6939180).

Almost surely, 2^129016657 is an apocalyptic number.

It is an amenable number.

129016657 is a deficient number, since it is larger than the sum of its proper divisors (37523663).

129016657 is a wasteful number, since it uses less digits than its factorization.

129016657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4141 (or 4134 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 129016657 is about 11358.5499514683. The cubic root of 129016657 is about 505.2991816046.

The spelling of 129016657 in words is "one hundred twenty-nine million, sixteen thousand, six hundred fifty-seven".