834683821 has 2 divisors, whose sum is σ = 834683822. Its totient is φ = 834683820.

The previous prime is 834683819. The next prime is 834683827. The reversal of 834683821 is 128386438.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 695113225 + 139570596 = 26365^2 + 11814^2 .

It is a cyclic number.

It is not a de Polignac number, because 834683821 - 2¹ = 834683819 is a prime.

Together with 834683819, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (834683827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417341910 + 417341911.

It is an arithmetic number, because the mean of its divisors is an integer number (417341911).

Almost surely, 2^834683821 is an apocalyptic number.

It is an amenable number.

834683821 is a deficient number, since it is larger than the sum of its proper divisors (1).

834683821 is an equidigital number, since it uses as much as digits as its factorization.

834683821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 221184, while the sum is 43.

The square root of 834683821 is about 28890.8951228583. The cubic root of 834683821 is about 941.5440975440.

The spelling of 834683821 in words is "eight hundred thirty-four million, six hundred eighty-three thousand, eight hundred twenty-one".