1143439983 has 40 divisors (see below), whose sum is σ = 1957063680. Its totient is φ = 651738960.

The previous prime is 1143439981. The next prime is 1143440003. The reversal of 1143439983 is 3899343411.

It is not a de Polignac number, because 1143439983 - 2¹ = 1143439981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143439981) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 242038 + ... + 246716.

It is an arithmetic number, because the mean of its divisors is an integer number (48926592).

Almost surely, 2^1143439983 is an apocalyptic number.

1143439983 is a deficient number, since it is larger than the sum of its proper divisors (813623697).

1143439983 is an equidigital number, since it uses as much as digits as its factorization.

1143439983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5129 (or 5120 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 1143439983 is about 33814.7894123267. The cubic root of 1143439983 is about 1045.6936194662.

The spelling of 1143439983 in words is "one billion, one hundred forty-three million, four hundred thirty-nine thousand, nine hundred eighty-three".