6853999 has 2 divisors, whose sum is σ = 6854000. Its totient is φ = 6853998.

The previous prime is 6853997. The next prime is 6854027. The reversal of 6853999 is 9993586.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6853999 - 2¹ = 6853997 is a prime.

Together with 6853997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6853993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3426999 + 3427000.

It is an arithmetic number, because the mean of its divisors is an integer number (3427000).

Almost surely, 2^6853999 is an apocalyptic number.

6853999 is a deficient number, since it is larger than the sum of its proper divisors (1).

6853999 is an equidigital number, since it uses as much as digits as its factorization.

6853999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 524880, while the sum is 49.

The square root of 6853999 is about 2618.0143238722. The cubic root of 6853999 is about 189.9538114873.

The spelling of 6853999 in words is "six million, eight hundred fifty-three thousand, nine hundred ninety-nine".