6826399 has 2 divisors, whose sum is σ = 6826400. Its totient is φ = 6826398.

The previous prime is 6826381. The next prime is 6826403. The reversal of 6826399 is 9936286.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6826399 - 2⁷ = 6826271 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6826319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3413199 + 3413200.

It is an arithmetic number, because the mean of its divisors is an integer number (3413200).

Almost surely, 2^6826399 is an apocalyptic number.

6826399 is a deficient number, since it is larger than the sum of its proper divisors (1).

6826399 is an equidigital number, since it uses as much as digits as its factorization.

6826399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 43.

The square root of 6826399 is about 2612.7378360639. The cubic root of 6826399 is about 189.6984968795.

It can be divided in two parts, 6826 and 399, that added together give a square (7225 = 85²).

The spelling of 6826399 in words is "six million, eight hundred twenty-six thousand, three hundred ninety-nine".