129883685 has 8 divisors (see below), whose sum is σ = 156982560. Its totient is φ = 103158864.

The previous prime is 129883681. The next prime is 129883697. The reversal of 129883685 is 586388921.

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 129883685 - 2² = 129883681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129883681) 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, 92747 + ... + 94136.

It is an arithmetic number, because the mean of its divisors is an integer number (19622820).

Almost surely, 2^129883685 is an apocalyptic number.

It is an amenable number.

129883685 is a deficient number, since it is larger than the sum of its proper divisors (27098875).

129883685 is a wasteful number, since it uses less digits than its factorization.

129883685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187027.

The product of its digits is 829440, while the sum is 50.

The square root of 129883685 is about 11396.6523593554. The cubic root of 129883685 is about 506.4285726790.

It can be divided in two parts, 1298836 and 85, that added together give a palindrome (1298921).

The spelling of 129883685 in words is "one hundred twenty-nine million, eight hundred eighty-three thousand, six hundred eighty-five".