6855829 has 2 divisors, whose sum is σ = 6855830. Its totient is φ = 6855828.

The previous prime is 6855809. The next prime is 6855869. The reversal of 6855829 is 9285586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5280804 + 1575025 = 2298^2 + 1255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6855829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6855809) 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 as a sum of consecutive naturals, namely, 3427914 + 3427915.

It is an arithmetic number, because the mean of its divisors is an integer number (3427915).

Almost surely, 2^6855829 is an apocalyptic number.

It is an amenable number.

6855829 is a deficient number, since it is larger than the sum of its proper divisors (1).

6855829 is an equidigital number, since it uses as much as digits as its factorization.

6855829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 43.

The square root of 6855829 is about 2618.3638020718. The cubic root of 6855829 is about 189.9707157083.

The spelling of 6855829 in words is "six million, eight hundred fifty-five thousand, eight hundred twenty-nine".