6849009449 has 2 divisors, whose sum is σ = 6849009450. Its totient is φ = 6849009448.

The previous prime is 6849009413. The next prime is 6849009499. The reversal of 6849009449 is 9449009486.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5993856400 + 855153049 = 77420^2 + 29243^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6849009449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6849009449.

It is not a weakly prime, because it can be changed into another prime (6849009499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3424504724 + 3424504725.

It is an arithmetic number, because the mean of its divisors is an integer number (3424504725).

Almost surely, 2^6849009449 is an apocalyptic number.

It is an amenable number.

6849009449 is a deficient number, since it is larger than the sum of its proper divisors (1).

6849009449 is an equidigital number, since it uses as much as digits as its factorization.

6849009449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2239488, while the sum is 53.

The square root of 6849009449 is about 82758.7424324464. The cubic root of 6849009449 is about 1899.0770632000.

The spelling of 6849009449 in words is "six billion, eight hundred forty-nine million, nine thousand, four hundred forty-nine".