1143564817 has 2 divisors, whose sum is σ = 1143564818. Its totient is φ = 1143564816.

The previous prime is 1143564791. The next prime is 1143564901. The reversal of 1143564817 is 7184653411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 730296576 + 413268241 = 27024^2 + 20329^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143564817 - 2¹⁹ = 1143040529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1143564817.

It is not a weakly prime, because it can be changed into another prime (1143864817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571782408 + 571782409.

It is an arithmetic number, because the mean of its divisors is an integer number (571782409).

Almost surely, 2^1143564817 is an apocalyptic number.

It is an amenable number.

1143564817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143564817 is an equidigital number, since it uses as much as digits as its factorization.

1143564817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 40.

The square root of 1143564817 is about 33816.6352110910. The cubic root of 1143564817 is about 1045.7316722919.

The spelling of 1143564817 in words is "one billion, one hundred forty-three million, five hundred sixty-four thousand, eight hundred seventeen".