1311343441 has 4 divisors (see below), whose sum is σ = 1313334000. Its totient is φ = 1309352884.

The previous prime is 1311343409. The next prime is 1311343471. The reversal of 1311343441 is 1443431131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1311343441 - 2⁵ = 1311343409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311343471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 994291 + ... + 995608.

It is an arithmetic number, because the mean of its divisors is an integer number (328333500).

Almost surely, 2^1311343441 is an apocalyptic number.

It is an amenable number.

1311343441 is a deficient number, since it is larger than the sum of its proper divisors (1990559).

1311343441 is an equidigital number, since it uses as much as digits as its factorization.

1311343441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990558.

The product of its digits is 1728, while the sum is 25.

The square root of 1311343441 is about 36212.4763168718. The cubic root of 1311343441 is about 1094.5580922231.

Adding to 1311343441 its reverse (1443431131), we get a palindrome (2754774572).

The spelling of 1311343441 in words is "one billion, three hundred eleven million, three hundred forty-three thousand, four hundred forty-one".