6815849 has 2 divisors, whose sum is σ = 6815850. Its totient is φ = 6815848.

The previous prime is 6815839. The next prime is 6815863. The reversal of 6815849 is 9485186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5107600 + 1708249 = 2260^2 + 1307^2 .

It is a cyclic number.

It is not a de Polignac number, because 6815849 - 2⁴ = 6815833 is a prime.

It is not a weakly prime, because it can be changed into another prime (6815839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3407924 + 3407925.

It is an arithmetic number, because the mean of its divisors is an integer number (3407925).

Almost surely, 2^6815849 is an apocalyptic number.

It is an amenable number.

6815849 is a deficient number, since it is larger than the sum of its proper divisors (1).

6815849 is an equidigital number, since it uses as much as digits as its factorization.

6815849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 41.

The square root of 6815849 is about 2610.7181004467. The cubic root of 6815849 is about 189.6007219999.

The spelling of 6815849 in words is "six million, eight hundred fifteen thousand, eight hundred forty-nine".