806822721 has 16 divisors (see below), whose sum is σ = 1199848320. Its totient is φ = 535831920.

The previous prime is 806822713. The next prime is 806822741. The reversal of 806822721 is 127228608.

It is a happy number.

It is not a de Polignac number, because 806822721 - 2³ = 806822713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (806822701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49710 + ... + 63911.

It is an arithmetic number, because the mean of its divisors is an integer number (74990520).

Almost surely, 2^806822721 is an apocalyptic number.

It is an amenable number.

806822721 is a deficient number, since it is larger than the sum of its proper divisors (393025599).

806822721 is a wasteful number, since it uses less digits than its factorization.

806822721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113893 (or 113887 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 806822721 is about 28404.6249931239. The cubic root of 806822721 is about 930.9493219880.

The spelling of 806822721 in words is "eight hundred six million, eight hundred twenty-two thousand, seven hundred twenty-one".