129428659 has 8 divisors (see below), whose sum is σ = 135263520. Its totient is φ = 123611136.

The previous prime is 129428639. The next prime is 129428687. The reversal of 129428659 is 956824921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129428659 - 2¹¹ = 129426611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129428639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12339 + ... + 20275.

It is an arithmetic number, because the mean of its divisors is an integer number (16907940).

Almost surely, 2^129428659 is an apocalyptic number.

129428659 is a deficient number, since it is larger than the sum of its proper divisors (5834861).

129428659 is an equidigital number, since it uses as much as digits as its factorization.

129428659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8669.

The product of its digits is 311040, while the sum is 46.

The square root of 129428659 is about 11376.6717013369. The cubic root of 129428659 is about 505.8364844750.

The spelling of 129428659 in words is "one hundred twenty-nine million, four hundred twenty-eight thousand, six hundred fifty-nine".