129645307 has 4 divisors (see below), whose sum is σ = 141431256. Its totient is φ = 117859360.

The previous prime is 129645293. The next prime is 129645323. The reversal of 129645307 is 703546921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129645307 - 2¹⁹ = 129121019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129645377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5892958 + ... + 5892979.

It is an arithmetic number, because the mean of its divisors is an integer number (35357814).

Almost surely, 2^129645307 is an apocalyptic number.

129645307 is a deficient number, since it is larger than the sum of its proper divisors (11785949).

129645307 is a wasteful number, since it uses less digits than its factorization.

129645307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11785948.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 129645307 is about 11386.1893098613. The cubic root of 129645307 is about 506.1185636125.

The spelling of 129645307 in words is "one hundred twenty-nine million, six hundred forty-five thousand, three hundred seven".