1320123443 has 2 divisors, whose sum is σ = 1320123444. Its totient is φ = 1320123442.

The previous prime is 1320123403. The next prime is 1320123473. The reversal of 1320123443 is 3443210231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1320123443 - 2¹⁴ = 1320107059 is a prime.

It is not a weakly prime, because it can be changed into another prime (1320123403) 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 as a sum of consecutive naturals, namely, 660061721 + 660061722.

It is an arithmetic number, because the mean of its divisors is an integer number (660061722).

Almost surely, 2^1320123443 is an apocalyptic number.

1320123443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320123443 is an equidigital number, since it uses as much as digits as its factorization.

1320123443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1320123443 is about 36333.5030378300. The cubic root of 1320123443 is about 1096.9955044194.

Adding to 1320123443 its reverse (3443210231), we get a palindrome (4763333674).

The spelling of 1320123443 in words is "one billion, three hundred twenty million, one hundred twenty-three thousand, four hundred forty-three".