1143759811 has 4 divisors (see below), whose sum is σ = 1143906400. Its totient is φ = 1143613224.

The previous prime is 1143759791. The next prime is 1143759823. The reversal of 1143759811 is 1189573411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1189573411 = 13 ⋅91505647.

It is a cyclic number.

It is not a de Polignac number, because 1143759811 - 2²³ = 1135371203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143759871) 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, 60891 + ... + 77428.

It is an arithmetic number, because the mean of its divisors is an integer number (285976600).

Almost surely, 2^1143759811 is an apocalyptic number.

1143759811 is a deficient number, since it is larger than the sum of its proper divisors (146589).

1143759811 is an equidigital number, since it uses as much as digits as its factorization.

1143759811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146588.

The product of its digits is 30240, while the sum is 40.

The square root of 1143759811 is about 33819.5181958584. The cubic root of 1143759811 is about 1045.7911062683.

The spelling of 1143759811 in words is "one billion, one hundred forty-three million, seven hundred fifty-nine thousand, eight hundred eleven".