806803821 has 60 divisors (see below), whose sum is σ = 1327553920. Its totient is φ = 486913680.

The previous prime is 806803817. The next prime is 806803889. The reversal of 806803821 is 128308608.

806803821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 806803821 - 2² = 806803817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806803321) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 813636 + ... + 814626.

Almost surely, 2^806803821 is an apocalyptic number.

806803821 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

806803821 is a deficient number, since it is larger than the sum of its proper divisors (520750099).

806803821 is a wasteful number, since it uses less digits than its factorization.

806803821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068 (or 1036 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 806803821 is about 28404.2922988762. The cubic root of 806803821 is about 930.9420527003.

The spelling of 806803821 in words is "eight hundred six million, eight hundred three thousand, eight hundred twenty-one".