129317299 has 4 divisors (see below), whose sum is σ = 129443760. Its totient is φ = 129190840.

The previous prime is 129317281. The next prime is 129317323. The reversal of 129317299 is 992713921.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129317299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129317219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61684 + ... + 63745.

It is an arithmetic number, because the mean of its divisors is an integer number (32360940).

Almost surely, 2^129317299 is an apocalyptic number.

129317299 is a deficient number, since it is larger than the sum of its proper divisors (126461).

129317299 is a wasteful number, since it uses less digits than its factorization.

129317299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126460.

The product of its digits is 61236, while the sum is 43.

The square root of 129317299 is about 11371.7764223537. The cubic root of 129317299 is about 505.6913694893.

The spelling of 129317299 in words is "one hundred twenty-nine million, three hundred seventeen thousand, two hundred ninety-nine".