1143321999 has 8 divisors (see below), whose sum is σ = 1524589440. Its totient is φ = 762134616.

The previous prime is 1143321931. The next prime is 1143322007. The reversal of 1143321999 is 9991233411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1143321999 - 2¹¹ = 1143319951 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1143321999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143321899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34612 + ... + 59030.

It is an arithmetic number, because the mean of its divisors is an integer number (190573680).

Almost surely, 2^1143321999 is an apocalyptic number.

1143321999 is a deficient number, since it is larger than the sum of its proper divisors (381267441).

1143321999 is a wasteful number, since it uses less digits than its factorization.

1143321999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40029.

The product of its digits is 52488, while the sum is 42.

The square root of 1143321999 is about 33813.0448052227. The cubic root of 1143321999 is about 1045.6576521625.

The spelling of 1143321999 in words is "one billion, one hundred forty-three million, three hundred twenty-one thousand, nine hundred ninety-nine".