823321297 has 2 divisors, whose sum is σ = 823321298. Its totient is φ = 823321296.

The previous prime is 823321249. The next prime is 823321321. The reversal of 823321297 is 792123328.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 741527361 + 81793936 = 27231^2 + 9044^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-823321297 is a prime.

It is not a weakly prime, because it can be changed into another prime (823321217) 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, 411660648 + 411660649.

It is an arithmetic number, because the mean of its divisors is an integer number (411660649).

Almost surely, 2^823321297 is an apocalyptic number.

It is an amenable number.

823321297 is a deficient number, since it is larger than the sum of its proper divisors (1).

823321297 is an equidigital number, since it uses as much as digits as its factorization.

823321297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 823321297 is about 28693.5758838106. The cubic root of 823321297 is about 937.2521597186.

The spelling of 823321297 in words is "eight hundred twenty-three million, three hundred twenty-one thousand, two hundred ninety-seven".