129842329 has 2 divisors, whose sum is σ = 129842330. Its totient is φ = 129842328.

The previous prime is 129842299. The next prime is 129842359. The reversal of 129842329 is 923248921.

It is a balanced prime because it is at equal distance from previous prime (129842299) and next prime (129842359).

It can be written as a sum of positive squares in only one way, i.e., 128936025 + 906304 = 11355^2 + 952^2 .

It is a cyclic number.

It is not a de Polignac number, because 129842329 - 2²⁵ = 96287897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129842291 and 129842300.

It is not a weakly prime, because it can be changed into another prime (129842359) 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, 64921164 + 64921165.

It is an arithmetic number, because the mean of its divisors is an integer number (64921165).

Almost surely, 2^129842329 is an apocalyptic number.

It is an amenable number.

129842329 is a deficient number, since it is larger than the sum of its proper divisors (1).

129842329 is an equidigital number, since it uses as much as digits as its factorization.

129842329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 129842329 is about 11394.8378224528. The cubic root of 129842329 is about 506.3748166759.

The spelling of 129842329 in words is "one hundred twenty-nine million, eight hundred forty-two thousand, three hundred twenty-nine".