820968843 has 8 divisors (see below), whose sum is σ = 1104312528. Its totient is φ = 542468864.

The previous prime is 820968829. The next prime is 820968899. The reversal of 820968843 is 348869028.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-820968843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 820968792 and 820968801.

It is not an unprimeable number, because it can be changed into a prime (820967843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1210530 + ... + 1211207.

It is an arithmetic number, because the mean of its divisors is an integer number (138039066).

Almost surely, 2^820968843 is an apocalyptic number.

820968843 is a deficient number, since it is larger than the sum of its proper divisors (283343685).

820968843 is a wasteful number, since it uses less digits than its factorization.

820968843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2421853.

The product of its (nonzero) digits is 663552, while the sum is 48.

The square root of 820968843 is about 28652.5538652316. The cubic root of 820968843 is about 936.3586463009.

The spelling of 820968843 in words is "eight hundred twenty million, nine hundred sixty-eight thousand, eight hundred forty-three".