1143223187 has 2 divisors, whose sum is σ = 1143223188. Its totient is φ = 1143223186.

The previous prime is 1143223127. The next prime is 1143223199. The reversal of 1143223187 is 7813223411.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1143223187 is a prime.

It is not a weakly prime, because it can be changed into another prime (1143223127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571611593 + 571611594.

It is an arithmetic number, because the mean of its divisors is an integer number (571611594).

Almost surely, 2^1143223187 is an apocalyptic number.

1143223187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143223187 is an equidigital number, since it uses as much as digits as its factorization.

1143223187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The square root of 1143223187 is about 33811.5836215934. The cubic root of 1143223187 is about 1045.6275275196.

Adding to 1143223187 its reverse (7813223411), we get a palindrome (8956446598).

The spelling of 1143223187 in words is "one billion, one hundred forty-three million, two hundred twenty-three thousand, one hundred eighty-seven".