1143440113 has 4 divisors (see below), whose sum is σ = 1144213668. Its totient is φ = 1142666560.

The previous prime is 1143440093. The next prime is 1143440131. The reversal of 1143440113 is 3110443411.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 201441249 + 941998864 = 14193^2 + 30692^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1143440113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143440143) 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, 384556 + ... + 387517.

It is an arithmetic number, because the mean of its divisors is an integer number (286053417).

Almost surely, 2^1143440113 is an apocalyptic number.

It is an amenable number.

1143440113 is a deficient number, since it is larger than the sum of its proper divisors (773555).

1143440113 is an equidigital number, since it uses as much as digits as its factorization.

1143440113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773554.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1143440113 is about 33814.7913345625. The cubic root of 1143440113 is about 1045.6936590952.

Adding to 1143440113 its reverse (3110443411), we get a palindrome (4253883524).

The spelling of 1143440113 in words is "one billion, one hundred forty-three million, four hundred forty thousand, one hundred thirteen".