129838297 has 2 divisors, whose sum is σ = 129838298. Its totient is φ = 129838296.

The previous prime is 129838213. The next prime is 129838301. The reversal of 129838297 is 792838921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102839881 + 26998416 = 10141^2 + 5196^2 .

It is a cyclic number.

It is not a de Polignac number, because 129838297 - 2¹¹ = 129836249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129838297.

It is not a weakly prime, because it can be changed into another prime (129838207) 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, 64919148 + 64919149.

It is an arithmetic number, because the mean of its divisors is an integer number (64919149).

Almost surely, 2^129838297 is an apocalyptic number.

It is an amenable number.

129838297 is a deficient number, since it is larger than the sum of its proper divisors (1).

129838297 is an equidigital number, since it uses as much as digits as its factorization.

129838297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 49.

The square root of 129838297 is about 11394.6608988596. The cubic root of 129838297 is about 506.3695751279.

The spelling of 129838297 in words is "one hundred twenty-nine million, eight hundred thirty-eight thousand, two hundred ninety-seven".