83322821 has 4 divisors (see below), whose sum is σ = 83341644. Its totient is φ = 83304000.

The previous prime is 83322817. The next prime is 83322851. The reversal of 83322821 is 12822338.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27984100 + 55338721 = 5290^2 + 7439^2 .

It is a cyclic number.

It is not a de Polignac number, because 83322821 - 2² = 83322817 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 (83322851) 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 in 3 ways as a sum of consecutive naturals, for example, 1271 + ... + 12971.

It is an arithmetic number, because the mean of its divisors is an integer number (20835411).

Almost surely, 2^83322821 is an apocalyptic number.

It is an amenable number.

83322821 is a deficient number, since it is larger than the sum of its proper divisors (18823).

83322821 is a wasteful number, since it uses less digits than its factorization.

83322821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18822.

The product of its digits is 4608, while the sum is 29.

The square root of 83322821 is about 9128.1334893832. The cubic root of 83322821 is about 436.7718648577.

The spelling of 83322821 in words is "eighty-three million, three hundred twenty-two thousand, eight hundred twenty-one".