129803685 has 32 divisors (see below), whose sum is σ = 228839040. Its totient is φ = 62304000.

The previous prime is 129803683. The next prime is 129803693. The reversal of 129803685 is 586308921.

It is not a de Polignac number, because 129803685 - 2¹ = 129803683 is a prime.

It is a super-3 number, since 3×129803685³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129803683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12771 + ... + 20559.

It is an arithmetic number, because the mean of its divisors is an integer number (7151220).

Almost surely, 2^129803685 is an apocalyptic number.

129803685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129803685 is a deficient number, since it is larger than the sum of its proper divisors (99035355).

129803685 is a wasteful number, since it uses less digits than its factorization.

129803685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7909.

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 129803685 is about 11393.1420161429. The cubic root of 129803685 is about 506.3245755097.

The spelling of 129803685 in words is "one hundred twenty-nine million, eight hundred three thousand, six hundred eighty-five".