6438799 has 2 divisors, whose sum is σ = 6438800. Its totient is φ = 6438798.

The previous prime is 6438749. The next prime is 6438829. The reversal of 6438799 is 9978346.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6438799 - 2¹¹ = 6436751 is a prime.

6438799 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6438749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3219399 + 3219400.

It is an arithmetic number, because the mean of its divisors is an integer number (3219400).

Almost surely, 2^6438799 is an apocalyptic number.

6438799 is a deficient number, since it is larger than the sum of its proper divisors (1).

6438799 is an equidigital number, since it uses as much as digits as its factorization.

6438799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The square root of 6438799 is about 2537.4788669071. The cubic root of 6438799 is about 186.0379831475.

The spelling of 6438799 in words is "six million, four hundred thirty-eight thousand, seven hundred ninety-nine".