1143719111 has 2 divisors, whose sum is σ = 1143719112. Its totient is φ = 1143719110.

The previous prime is 1143719077. The next prime is 1143719113. The reversal of 1143719111 is 1119173411.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1143719111 is a prime.

Together with 1143719113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1143719113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571859555 + 571859556.

It is an arithmetic number, because the mean of its divisors is an integer number (571859556).

Almost surely, 2^1143719111 is an apocalyptic number.

1143719111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143719111 is an equidigital number, since it uses as much as digits as its factorization.

1143719111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 29.

The square root of 1143719111 is about 33818.9164669716. The cubic root of 1143719111 is about 1045.7787015068.

The spelling of 1143719111 in words is "one billion, one hundred forty-three million, seven hundred nineteen thousand, one hundred eleven".