1143423999 has 8 divisors (see below), whose sum is σ = 1693961520. Its totient is φ = 762282648.

The previous prime is 1143423997. The next prime is 1143424013. The reversal of 1143423999 is 9993243411.

It is not a de Polignac number, because 1143423999 - 2¹ = 1143423997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143423991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21174492 + ... + 21174545.

It is an arithmetic number, because the mean of its divisors is an integer number (211745190).

Almost surely, 2^1143423999 is an apocalyptic number.

1143423999 is a deficient number, since it is larger than the sum of its proper divisors (550537521).

1143423999 is an equidigital number, since it uses as much as digits as its factorization.

1143423999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42349046 (or 42349040 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 1143423999 is about 33814.5530652114. The cubic root of 1143423999 is about 1045.6887469048.

It can be divided in two parts, 114342 and 3999, that added together give a triangular number (118341 = T₄₈₆).

The spelling of 1143423999 in words is "one billion, one hundred forty-three million, four hundred twenty-three thousand, nine hundred ninety-nine".