129669713 has 4 divisors (see below), whose sum is σ = 131795508. Its totient is φ = 127543920.

The previous prime is 129669703. The next prime is 129669721. The reversal of 129669713 is 317966921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 317966921 = 193 ⋅1647497.

It can be written as a sum of positive squares in 2 ways, for example, as 14922769 + 114746944 = 3863^2 + 10712^2 .

It is a cyclic number.

It is not a de Polignac number, because 129669713 - 2⁸ = 129669457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129669703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1062806 + ... + 1062927.

It is an arithmetic number, because the mean of its divisors is an integer number (32948877).

Almost surely, 2^129669713 is an apocalyptic number.

It is an amenable number.

129669713 is a deficient number, since it is larger than the sum of its proper divisors (2125795).

129669713 is an equidigital number, since it uses as much as digits as its factorization.

129669713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125794.

The product of its digits is 122472, while the sum is 44.

The square root of 129669713 is about 11387.2609963942. The cubic root of 129669713 is about 506.1503209123.

The spelling of 129669713 in words is "one hundred twenty-nine million, six hundred sixty-nine thousand, seven hundred thirteen".