6438829 has 2 divisors, whose sum is σ = 6438830. Its totient is φ = 6438828.

The previous prime is 6438799. The next prime is 6438833. The reversal of 6438829 is 9288346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4473225 + 1965604 = 2115^2 + 1402^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6438829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6438791 and 6438800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6438889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3219414 + 3219415.

It is an arithmetic number, because the mean of its divisors is an integer number (3219415).

Almost surely, 2^6438829 is an apocalyptic number.

It is an amenable number.

6438829 is a deficient number, since it is larger than the sum of its proper divisors (1).

6438829 is an equidigital number, since it uses as much as digits as its factorization.

6438829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 40.

The square root of 6438829 is about 2537.4847782795. The cubic root of 6438829 is about 186.0382720797.

The spelling of 6438829 in words is "six million, four hundred thirty-eight thousand, eight hundred twenty-nine".