123320243 has 2 divisors, whose sum is σ = 123320244. Its totient is φ = 123320242.

The previous prime is 123320231. The next prime is 123320257. The reversal of 123320243 is 342023321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123320243 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (123320213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61660121 + 61660122.

It is an arithmetic number, because the mean of its divisors is an integer number (61660122).

Almost surely, 2^123320243 is an apocalyptic number.

123320243 is a deficient number, since it is larger than the sum of its proper divisors (1).

123320243 is an equidigital number, since it uses as much as digits as its factorization.

123320243 is an evil number, because the sum of its binary digits is even.

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

The square root of 123320243 is about 11104.9647905790. The cubic root of 123320243 is about 497.7502161282.

Adding to 123320243 its reverse (342023321), we get a palindrome (465343564).

The spelling of 123320243 in words is "one hundred twenty-three million, three hundred twenty thousand, two hundred forty-three".