129788307 has 12 divisors (see below), whose sum is σ = 204515064. Its totient is φ = 78659520.

The previous prime is 129788279. The next prime is 129788327. The reversal of 129788307 is 703887921.

It is not a de Polignac number, because 129788307 - 2⁸ = 129788051 is a prime.

It is a super-3 number, since 3×129788307³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (129788327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 655398 + ... + 655595.

It is an arithmetic number, because the mean of its divisors is an integer number (17042922).

Almost surely, 2^129788307 is an apocalyptic number.

129788307 is a deficient number, since it is larger than the sum of its proper divisors (74726757).

129788307 is a wasteful number, since it uses less digits than its factorization.

129788307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311010 (or 1311007 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 129788307 is about 11392.4671164766. The cubic root of 129788307 is about 506.3045797579.

The spelling of 129788307 in words is "one hundred twenty-nine million, seven hundred eighty-eight thousand, three hundred seven".