129289129 has 8 divisors (see below), whose sum is σ = 136239840. Its totient is φ = 122353056.

The previous prime is 129289123. The next prime is 129289157. The reversal of 129289129 is 921982921.

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 129289129 - 2¹⁹ = 128764841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129289123) 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, 17742 + ... + 23944.

It is an arithmetic number, because the mean of its divisors is an integer number (17029980).

Almost surely, 2^129289129 is an apocalyptic number.

129289129 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

129289129 is a deficient number, since it is larger than the sum of its proper divisors (6950711).

129289129 is a wasteful number, since it uses less digits than its factorization.

129289129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7319.

The product of its digits is 46656, while the sum is 43.

The square root of 129289129 is about 11370.5377621289. The cubic root of 129289129 is about 505.6546475129.

The spelling of 129289129 in words is "one hundred twenty-nine million, two hundred eighty-nine thousand, one hundred twenty-nine".