129709313 has 2 divisors, whose sum is σ = 129709314. Its totient is φ = 129709312.

The previous prime is 129709297. The next prime is 129709357. The reversal of 129709313 is 313907921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90859024 + 38850289 = 9532^2 + 6233^2 .

It is a cyclic number.

It is not a de Polignac number, because 129709313 - 2⁴ = 129709297 is a prime.

It is not a weakly prime, because it can be changed into another prime (129709513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64854656 + 64854657.

It is an arithmetic number, because the mean of its divisors is an integer number (64854657).

Almost surely, 2^129709313 is an apocalyptic number.

It is an amenable number.

129709313 is a deficient number, since it is larger than the sum of its proper divisors (1).

129709313 is an equidigital number, since it uses as much as digits as its factorization.

129709313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 129709313 is about 11388.9996487839. Note that the first 3 decimals coincide. The cubic root of 129709313 is about 506.2018403001.

The spelling of 129709313 in words is "one hundred twenty-nine million, seven hundred nine thousand, three hundred thirteen".