1143221173 has 2 divisors, whose sum is σ = 1143221174. Its totient is φ = 1143221172.

The previous prime is 1143221171. The next prime is 1143221213. The reversal of 1143221173 is 3711223411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1050926724 + 92294449 = 32418^2 + 9607^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143221173 - 2¹ = 1143221171 is a prime.

Together with 1143221171, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1143221171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571610586 + 571610587.

It is an arithmetic number, because the mean of its divisors is an integer number (571610587).

Almost surely, 2^1143221173 is an apocalyptic number.

It is an amenable number.

1143221173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143221173 is an equidigital number, since it uses as much as digits as its factorization.

1143221173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 25.

The square root of 1143221173 is about 33811.5538388877. The cubic root of 1143221173 is about 1045.6269134969.

Adding to 1143221173 its reverse (3711223411), we get a palindrome (4854444584).

The spelling of 1143221173 in words is "one billion, one hundred forty-three million, two hundred twenty-one thousand, one hundred seventy-three".