6806439049 has 2 divisors, whose sum is σ = 6806439050. Its totient is φ = 6806439048.

The previous prime is 6806439001. The next prime is 6806439053. The reversal of 6806439049 is 9409346086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5313389449 + 1493049600 = 72893^2 + 38640^2 .

It is a cyclic number.

It is not a de Polignac number, because 6806439049 - 2²¹ = 6804341897 is a prime.

It is a super-2 number, since 2×6806439049² = 92655225055504048802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6806438993 and 6806439011.

It is not a weakly prime, because it can be changed into another prime (6806439089) 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, 3403219524 + 3403219525.

It is an arithmetic number, because the mean of its divisors is an integer number (3403219525).

Almost surely, 2^6806439049 is an apocalyptic number.

It is an amenable number.

6806439049 is a deficient number, since it is larger than the sum of its proper divisors (1).

6806439049 is an equidigital number, since it uses as much as digits as its factorization.

6806439049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1119744, while the sum is 49.

The square root of 6806439049 is about 82501.1457435592. The cubic root of 6806439049 is about 1895.1342765641.

The spelling of 6806439049 in words is "six billion, eight hundred six million, four hundred thirty-nine thousand, forty-nine".