806644219 has 2 divisors, whose sum is σ = 806644220. Its totient is φ = 806644218.

The previous prime is 806644213. The next prime is 806644229. The reversal of 806644219 is 912446608.

806644219 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 806644219 - 2⁹ = 806643707 is a prime.

It is a super-2 number, since 2×806644219² = 1301349792092239922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (806644213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403322109 + 403322110.

It is an arithmetic number, because the mean of its divisors is an integer number (403322110).

Almost surely, 2^806644219 is an apocalyptic number.

806644219 is a deficient number, since it is larger than the sum of its proper divisors (1).

806644219 is an equidigital number, since it uses as much as digits as its factorization.

806644219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 806644219 is about 28401.4826901695. The cubic root of 806644219 is about 930.8806623068.

The spelling of 806644219 in words is "eight hundred six million, six hundred forty-four thousand, two hundred nineteen".