6899 has 2 divisors, whose sum is σ = 6900. Its totient is φ = 6898.

The previous prime is 6883. The next prime is 6907. The reversal of 6899 is 9986.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6899 - 2⁴ = 6883 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

6899 is a modest number, since divided by 99 gives 68 as remainder.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (6829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3449 + 3450.

It is an arithmetic number, because the mean of its divisors is an integer number (3450).

2⁶⁸⁹⁹ is an apocalyptic number.

6899 is a deficient number, since it is larger than the sum of its proper divisors (1).

6899 is an equidigital number, since it uses as much as digits as its factorization.

6899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 32.

The square root of 6899 is about 83.0602191184. The cubic root of 6899 is about 19.0368628756.

The spelling of 6899 in words is "six thousand, eight hundred ninety-nine".