129284089 has 8 divisors (see below), whose sum is σ = 141137568. Its totient is φ = 117447360.

The previous prime is 129284069. The next prime is 129284093. The reversal of 129284089 is 980482921.

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 129284089 - 2²¹ = 127186937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129284009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16369 + ... + 22945.

It is an arithmetic number, because the mean of its divisors is an integer number (17642196).

Almost surely, 2^129284089 is an apocalyptic number.

It is an amenable number.

129284089 is a deficient number, since it is larger than the sum of its proper divisors (11853479).

129284089 is a wasteful number, since it uses less digits than its factorization.

129284089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8375.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 129284089 is about 11370.3161345672. The cubic root of 129284089 is about 505.6480768843.

The spelling of 129284089 in words is "one hundred twenty-nine million, two hundred eighty-four thousand, eighty-nine".