1143031387 has 2 divisors, whose sum is σ = 1143031388. Its totient is φ = 1143031386.

The previous prime is 1143031321. The next prime is 1143031427. The reversal of 1143031387 is 7831303411.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1143031387 is a prime.

It is not a weakly prime, because it can be changed into another prime (1143731387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571515693 + 571515694.

It is an arithmetic number, because the mean of its divisors is an integer number (571515694).

Almost surely, 2^1143031387 is an apocalyptic number.

1143031387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143031387 is an equidigital number, since it uses as much as digits as its factorization.

1143031387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1143031387 is about 33808.7471965466. The cubic root of 1143031387 is about 1045.5690488315.

Adding to 1143031387 its reverse (7831303411), we get a palindrome (8974334798).

The spelling of 1143031387 in words is "one billion, one hundred forty-three million, thirty-one thousand, three hundred eighty-seven".