1243313299 has 2 divisors, whose sum is σ = 1243313300. Its totient is φ = 1243313298.

The previous prime is 1243313293. The next prime is 1243313327. The reversal of 1243313299 is 9923133421.

It is a weak prime.

It is an emirp because it is prime and its reverse (9923133421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243313299 is a prime.

It is not a weakly prime, because it can be changed into another prime (1243313293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621656649 + 621656650.

It is an arithmetic number, because the mean of its divisors is an integer number (621656650).

Almost surely, 2^1243313299 is an apocalyptic number.

1243313299 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243313299 is an equidigital number, since it uses as much as digits as its factorization.

1243313299 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 37.

The square root of 1243313299 is about 35260.6480229731. The cubic root of 1243313299 is about 1075.2931016894.

The spelling of 1243313299 in words is "one billion, two hundred forty-three million, three hundred thirteen thousand, two hundred ninety-nine".