833821 has 2 divisors, whose sum is σ = 833822. Its totient is φ = 833820.

The previous prime is 833801. The next prime is 833839. The reversal of 833821 is 128338.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 436921 + 396900 = 661^2 + 630^2 .

It is a cyclic number.

It is not a de Polignac number, because 833821 - 2⁹ = 833309 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (833801) 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 as a sum of consecutive naturals, namely, 416910 + 416911.

It is an arithmetic number, because the mean of its divisors is an integer number (416911).

2⁸³³⁸²¹ is an apocalyptic number.

It is an amenable number.

833821 is a deficient number, since it is larger than the sum of its proper divisors (1).

833821 is an equidigital number, since it uses as much as digits as its factorization.

833821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 25.

The square root of 833821 is about 913.1379961430. The cubic root of 833821 is about 94.1219557847.

The spelling of 833821 in words is "eight hundred thirty-three thousand, eight hundred twenty-one".