9820823 has 2 divisors, whose sum is σ = 9820824. Its totient is φ = 9820822.

The previous prime is 9820801. The next prime is 9820841. The reversal of 9820823 is 3280289.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3280289) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9820823 - 2¹² = 9816727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9820823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9820843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4910411 + 4910412.

It is an arithmetic number, because the mean of its divisors is an integer number (4910412).

Almost surely, 2^9820823 is an apocalyptic number.

9820823 is a deficient number, since it is larger than the sum of its proper divisors (1).

9820823 is an equidigital number, since it uses as much as digits as its factorization.

9820823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 9820823 is about 3133.8192353740. The cubic root of 9820823 is about 214.1489558920.

The spelling of 9820823 in words is "nine million, eight hundred twenty thousand, eight hundred twenty-three".