12129829 has 2 divisors, whose sum is σ = 12129830. Its totient is φ = 12129828.

The previous prime is 12129811. The next prime is 12129851. The reversal of 12129829 is 92892121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11068929 + 1060900 = 3327^2 + 1030^2 .

It is a cyclic number.

It is not a de Polignac number, because 12129829 - 2⁷ = 12129701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12129794 and 12129803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12129889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6064914 + 6064915.

It is an arithmetic number, because the mean of its divisors is an integer number (6064915).

Almost surely, 2^12129829 is an apocalyptic number.

It is an amenable number.

12129829 is a deficient number, since it is larger than the sum of its proper divisors (1).

12129829 is an equidigital number, since it uses as much as digits as its factorization.

12129829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 34.

The square root of 12129829 is about 3482.7904042592. The cubic root of 12129829 is about 229.7655392711.

The spelling of 12129829 in words is "twelve million, one hundred twenty-nine thousand, eight hundred twenty-nine".