1311243794 has 32 divisors (see below), whose sum is σ = 2279854080. Its totient is φ = 553990032.

The previous prime is 1311243767. The next prime is 1311243811. The reversal of 1311243794 is 4973421131.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 718367 + ... + 720189.

It is an arithmetic number, because the mean of its divisors is an integer number (71245440).

Almost surely, 2^1311243794 is an apocalyptic number.

1311243794 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1311243794 is a deficient number, since it is larger than the sum of its proper divisors (968610286).

1311243794 is a wasteful number, since it uses less digits than its factorization.

1311243794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2534.

The product of its digits is 18144, while the sum is 35.

The square root of 1311243794 is about 36211.1004251459. The cubic root of 1311243794 is about 1094.5303669175.

The spelling of 1311243794 in words is "one billion, three hundred eleven million, two hundred forty-three thousand, seven hundred ninety-four".