129575989 has 8 divisors (see below), whose sum is σ = 137749248. Its totient is φ = 121464000.

The previous prime is 129575983. The next prime is 129575993. The reversal of 129575989 is 989575921.

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 129575989 - 2³ = 129575981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129575981) 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, 10917 + ... + 19450.

It is an arithmetic number, because the mean of its divisors is an integer number (17218656).

Almost surely, 2^129575989 is an apocalyptic number.

It is an amenable number.

129575989 is a deficient number, since it is larger than the sum of its proper divisors (8173259).

129575989 is a wasteful number, since it uses less digits than its factorization.

129575989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30635.

The product of its digits is 2041200, while the sum is 55.

The square root of 129575989 is about 11383.1449520772. The cubic root of 129575989 is about 506.0283446864.

It can be divided in two parts, 1295 and 75989, that added together give a square (77284 = 278²).

The spelling of 129575989 in words is "one hundred twenty-nine million, five hundred seventy-five thousand, nine hundred eighty-nine".