129585869 has 8 divisors (see below), whose sum is σ = 149762880. Its totient is φ = 109825056.

The previous prime is 129585853. The next prime is 129585919. The reversal of 129585869 is 968585921.

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 129585869 - 2⁴ = 129585853 is a prime.

It is a super-2 number, since 2×129585869² = 33584994888970322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 129585869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129885869) 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, 103379 + ... + 104624.

It is an arithmetic number, because the mean of its divisors is an integer number (18720360).

Almost surely, 2^129585869 is an apocalyptic number.

It is an amenable number.

129585869 is a deficient number, since it is larger than the sum of its proper divisors (20177011).

129585869 is an equidigital number, since it uses as much as digits as its factorization.

129585869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208099.

The product of its digits is 1555200, while the sum is 53.

The square root of 129585869 is about 11383.5789187759. The cubic root of 129585869 is about 506.0412056931.

The spelling of 129585869 in words is "one hundred twenty-nine million, five hundred eighty-five thousand, eight hundred sixty-nine".