129300817 has 2 divisors, whose sum is σ = 129300818. Its totient is φ = 129300816.

The previous prime is 129300797. The next prime is 129300841. The reversal of 129300817 is 718003921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129254161 + 46656 = 11369^2 + 216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129300817 is a prime.

It is not a weakly prime, because it can be changed into another prime (129300617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64650408 + 64650409.

It is an arithmetic number, because the mean of its divisors is an integer number (64650409).

Almost surely, 2^129300817 is an apocalyptic number.

It is an amenable number.

129300817 is a deficient number, since it is larger than the sum of its proper divisors (1).

129300817 is an equidigital number, since it uses as much as digits as its factorization.

129300817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 129300817 is about 11371.0517103740. The cubic root of 129300817 is about 505.6698844563.

The spelling of 129300817 in words is "one hundred twenty-nine million, three hundred thousand, eight hundred seventeen".