80333821 has 2 divisors, whose sum is σ = 80333822. Its totient is φ = 80333820.

The previous prime is 80333809. The next prime is 80333833. The reversal of 80333821 is 12833308.

It is a balanced prime because it is at equal distance from previous prime (80333809) and next prime (80333833).

It can be written as a sum of positive squares in only one way, i.e., 63202500 + 17131321 = 7950^2 + 4139^2 .

It is a cyclic number.

It is not a de Polignac number, because 80333821 - 2²³ = 71945213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80333821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80333321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40166910 + 40166911.

It is an arithmetic number, because the mean of its divisors is an integer number (40166911).

Almost surely, 2^80333821 is an apocalyptic number.

It is an amenable number.

80333821 is a deficient number, since it is larger than the sum of its proper divisors (1).

80333821 is an equidigital number, since it uses as much as digits as its factorization.

80333821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 80333821 is about 8962.9136445689. The cubic root of 80333821 is about 431.4854359323.

The spelling of 80333821 in words is "eighty million, three hundred thirty-three thousand, eight hundred twenty-one".