12439829 has 2 divisors, whose sum is σ = 12439830. Its totient is φ = 12439828.

The previous prime is 12439783. The next prime is 12439837. The reversal of 12439829 is 92893421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12439729 + 100 = 3527^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 12439829 - 2²⁰ = 11391253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12439792 and 12439801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12439879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6219914 + 6219915.

It is an arithmetic number, because the mean of its divisors is an integer number (6219915).

Almost surely, 2^12439829 is an apocalyptic number.

It is an amenable number.

12439829 is a deficient number, since it is larger than the sum of its proper divisors (1).

12439829 is an equidigital number, since it uses as much as digits as its factorization.

12439829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 12439829 is about 3527.0141763254. The cubic root of 12439829 is about 231.7064571739.

The spelling of 12439829 in words is "twelve million, four hundred thirty-nine thousand, eight hundred twenty-nine".