804221849 has 2 divisors, whose sum is σ = 804221850. Its totient is φ = 804221848.

The previous prime is 804221843. The next prime is 804221903. The reversal of 804221849 is 948122408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 804119449 + 102400 = 28357^2 + 320^2 .

It is a cyclic number.

It is not a de Polignac number, because 804221849 - 2¹² = 804217753 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (804221843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402110924 + 402110925.

It is an arithmetic number, because the mean of its divisors is an integer number (402110925).

Almost surely, 2^804221849 is an apocalyptic number.

It is an amenable number.

804221849 is a deficient number, since it is larger than the sum of its proper divisors (1).

804221849 is an equidigital number, since it uses as much as digits as its factorization.

804221849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 804221849 is about 28358.8054931797. The cubic root of 804221849 is about 929.9479097506.

The spelling of 804221849 in words is "eight hundred four million, two hundred twenty-one thousand, eight hundred forty-nine".