1311043099 has 2 divisors, whose sum is σ = 1311043100. Its totient is φ = 1311043098.

The previous prime is 1311043061. The next prime is 1311043117. The reversal of 1311043099 is 9903401131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311043099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1311043099.

It is not a weakly prime, because it can be changed into another prime (1311043399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655521549 + 655521550.

It is an arithmetic number, because the mean of its divisors is an integer number (655521550).

Almost surely, 2^1311043099 is an apocalyptic number.

1311043099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311043099 is an equidigital number, since it uses as much as digits as its factorization.

1311043099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 1311043099 is about 36208.3291384731. The cubic root of 1311043099 is about 1094.4745222350.

The spelling of 1311043099 in words is "one billion, three hundred eleven million, forty-three thousand, ninety-nine".