1143548209 has 2 divisors, whose sum is σ = 1143548210. Its totient is φ = 1143548208.

The previous prime is 1143548191. The next prime is 1143548251. The reversal of 1143548209 is 9028453411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 788037184 + 355511025 = 28072^2 + 18855^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143548209 - 2⁵ = 1143548177 is a prime.

It is not a weakly prime, because it can be changed into another prime (1143548509) 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, 571774104 + 571774105.

It is an arithmetic number, because the mean of its divisors is an integer number (571774105).

Almost surely, 2^1143548209 is an apocalyptic number.

It is an amenable number.

1143548209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143548209 is an equidigital number, since it uses as much as digits as its factorization.

1143548209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 1143548209 is about 33816.3896505822. The cubic root of 1143548209 is about 1045.7266098779.

The spelling of 1143548209 in words is "one billion, one hundred forty-three million, five hundred forty-eight thousand, two hundred nine".