129267317 has 4 divisors (see below), whose sum is σ = 136070880. Its totient is φ = 122463756.

The previous prime is 129267311. The next prime is 129267319. The reversal of 129267317 is 713762921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 713762921 = 4003 ⋅178307.

It is a cyclic number.

It is not a de Polignac number, because 129267317 - 2¹² = 129263221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129267311) 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, 3401753 + ... + 3401790.

It is an arithmetic number, because the mean of its divisors is an integer number (34017720).

Almost surely, 2^129267317 is an apocalyptic number.

It is an amenable number.

129267317 is a deficient number, since it is larger than the sum of its proper divisors (6803563).

129267317 is an equidigital number, since it uses as much as digits as its factorization.

129267317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6803562.

The product of its digits is 31752, while the sum is 38.

The square root of 129267317 is about 11369.5785761830. The cubic root of 129267317 is about 505.6262100628.

The spelling of 129267317 in words is "one hundred twenty-nine million, two hundred sixty-seven thousand, three hundred seventeen".