1311884143 has 16 divisors (see below), whose sum is σ = 1397523456. Its totient is φ = 1228724640.

The previous prime is 1311884137. The next prime is 1311884153. The reversal of 1311884143 is 3414881131.

It is a cyclic number.

It is not a de Polignac number, because 1311884143 - 2⁹ = 1311883631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311884099 and 1311884108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311884113) by changing a digit.

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, 987946 + ... + 989272.

It is an arithmetic number, because the mean of its divisors is an integer number (87345216).

Almost surely, 2^1311884143 is an apocalyptic number.

1311884143 is a deficient number, since it is larger than the sum of its proper divisors (85639313).

1311884143 is a wasteful number, since it uses less digits than its factorization.

1311884143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2214.

The product of its digits is 9216, while the sum is 34.

The square root of 1311884143 is about 36219.9412340771. The cubic root of 1311884143 is about 1094.7085100840.

It can be divided in two parts, 13118841 and 43, that added together give a square (13118884 = 3622²).

The spelling of 1311884143 in words is "one billion, three hundred eleven million, eight hundred eighty-four thousand, one hundred forty-three".