129830317 has 2 divisors, whose sum is σ = 129830318. Its totient is φ = 129830316.

The previous prime is 129830291. The next prime is 129830339. The reversal of 129830317 is 713038921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69705801 + 60124516 = 8349^2 + 7754^2 .

It is a cyclic number.

It is not a de Polignac number, because 129830317 - 2⁷ = 129830189 is a prime.

It is a super-2 number, since 2×129830317² = 33711822424640978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129830347) 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 as a sum of consecutive naturals, namely, 64915158 + 64915159.

It is an arithmetic number, because the mean of its divisors is an integer number (64915159).

Almost surely, 2^129830317 is an apocalyptic number.

It is an amenable number.

129830317 is a deficient number, since it is larger than the sum of its proper divisors (1).

129830317 is an equidigital number, since it uses as much as digits as its factorization.

129830317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 129830317 is about 11394.3107294825. The cubic root of 129830317 is about 506.3592009109.

The spelling of 129830317 in words is "one hundred twenty-nine million, eight hundred thirty thousand, three hundred seventeen".