1323020243 has 2 divisors, whose sum is σ = 1323020244. Its totient is φ = 1323020242.

The previous prime is 1323020239. The next prime is 1323020273. The reversal of 1323020243 is 3420203231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1323020243 - 2² = 1323020239 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1323020213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661510121 + 661510122.

It is an arithmetic number, because the mean of its divisors is an integer number (661510122).

Almost surely, 2^1323020243 is an apocalyptic number.

1323020243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323020243 is an equidigital number, since it uses as much as digits as its factorization.

1323020243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 1323020243 is about 36373.3452269653. The cubic root of 1323020243 is about 1097.7973120203.

Adding to 1323020243 its reverse (3420203231), we get a palindrome (4743223474).

The spelling of 1323020243 in words is "one billion, three hundred twenty-three million, twenty thousand, two hundred forty-three".