6842821049 has 2 divisors, whose sum is σ = 6842821050. Its totient is φ = 6842821048.

The previous prime is 6842821001. The next prime is 6842821061. The reversal of 6842821049 is 9401282486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6028746025 + 814075024 = 77645^2 + 28532^2 .

It is a cyclic number.

It is not a de Polignac number, because 6842821049 - 2²⁰ = 6841772473 is a prime.

It is not a weakly prime, because it can be changed into another prime (6842823049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3421410524 + 3421410525.

It is an arithmetic number, because the mean of its divisors is an integer number (3421410525).

Almost surely, 2^6842821049 is an apocalyptic number.

It is an amenable number.

6842821049 is a deficient number, since it is larger than the sum of its proper divisors (1).

6842821049 is an equidigital number, since it uses as much as digits as its factorization.

6842821049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 6842821049 is about 82721.3457881338. The cubic root of 6842821049 is about 1898.5049225651.

The spelling of 6842821049 in words is "six billion, eight hundred forty-two million, eight hundred twenty-one thousand, forty-nine".