1143989239 has 4 divisors (see below), whose sum is σ = 1145621880. Its totient is φ = 1142356600.

The previous prime is 1143989237. The next prime is 1143989251. The reversal of 1143989239 is 9329893411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1143989239 - 2¹ = 1143989237 is a prime.

It is a super-2 number, since 2×1143989239² = 2617422757895598242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1143989192 and 1143989201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143989233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815269 + ... + 816670.

It is an arithmetic number, because the mean of its divisors is an integer number (286405470).

Almost surely, 2^1143989239 is an apocalyptic number.

1143989239 is a deficient number, since it is larger than the sum of its proper divisors (1632641).

1143989239 is an equidigital number, since it uses as much as digits as its factorization.

1143989239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632640.

The product of its digits is 419904, while the sum is 49.

The square root of 1143989239 is about 33822.9099723841. The cubic root of 1143989239 is about 1045.8610270444.

The spelling of 1143989239 in words is "one billion, one hundred forty-three million, nine hundred eighty-nine thousand, two hundred thirty-nine".