129056689 has 16 divisors (see below), whose sum is σ = 137558016. Its totient is φ = 120888000.

The previous prime is 129056687. The next prime is 129056693. The reversal of 129056689 is 986650921.

It is a cyclic number.

It is not a de Polignac number, because 129056689 - 2¹ = 129056687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129056687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146719 + ... + 147595.

It is an arithmetic number, because the mean of its divisors is an integer number (8597376).

Almost surely, 2^129056689 is an apocalyptic number.

It is an amenable number.

129056689 is a deficient number, since it is larger than the sum of its proper divisors (8501327).

129056689 is a wasteful number, since it uses less digits than its factorization.

129056689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 129056689 is about 11360.3120115602. The cubic root of 129056689 is about 505.3514385392.

The spelling of 129056689 in words is "one hundred twenty-nine million, fifty-six thousand, six hundred eighty-nine".