6338681 has 4 divisors (see below), whose sum is σ = 6344100. Its totient is φ = 6333264.

The previous prime is 6338653. The next prime is 6338701. The reversal of 6338681 is 1868336.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1428025 + 4910656 = 1195^2 + 2216^2 .

It is a cyclic number.

It is not a de Polignac number, because 6338681 - 2¹⁸ = 6076537 is a prime.

It is a super-2 number, since 2×6338681² = 80357753639522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6338611) 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 in 3 ways as a sum of consecutive naturals, for example, 146 + ... + 3563.

It is an arithmetic number, because the mean of its divisors is an integer number (1586025).

Almost surely, 2^6338681 is an apocalyptic number.

It is an amenable number.

6338681 is a deficient number, since it is larger than the sum of its proper divisors (5419).

6338681 is a wasteful number, since it uses less digits than its factorization.

6338681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5418.

The product of its digits is 20736, while the sum is 35.

The square root of 6338681 is about 2517.6737278686. The cubic root of 6338681 is about 185.0686961825.

The spelling of 6338681 in words is "six million, three hundred thirty-eight thousand, six hundred eighty-one".