1143587111 has 2 divisors, whose sum is σ = 1143587112. Its totient is φ = 1143587110.

The previous prime is 1143587063. The next prime is 1143587153. The reversal of 1143587111 is 1117853411.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1143587111 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1143587311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571793555 + 571793556.

It is an arithmetic number, because the mean of its divisors is an integer number (571793556).

Almost surely, 2^1143587111 is an apocalyptic number.

1143587111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143587111 is an equidigital number, since it uses as much as digits as its factorization.

1143587111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 32.

The square root of 1143587111 is about 33816.9648401509. The cubic root of 1143587111 is about 1045.7384678229.

The spelling of 1143587111 in words is "one billion, one hundred forty-three million, five hundred eighty-seven thousand, one hundred eleven".