1143123989 has 32 divisors (see below), whose sum is σ = 1421107200. Its totient is φ = 916981296.

The previous prime is 1143123983. The next prime is 1143124033. The reversal of 1143123989 is 9893213411.

It is not a de Polignac number, because 1143123989 - 2²⁰ = 1142075413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143123983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 369242 + ... + 372324.

It is an arithmetic number, because the mean of its divisors is an integer number (44409600).

Almost surely, 2^1143123989 is an apocalyptic number.

It is an amenable number.

1143123989 is a deficient number, since it is larger than the sum of its proper divisors (277983211).

1143123989 is an equidigital number, since it uses as much as digits as its factorization.

1143123989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3174 (or 3160 counting only the distinct ones).

The product of its digits is 46656, while the sum is 41.

The square root of 1143123989 is about 33810.1166664654. The cubic root of 1143123989 is about 1045.5972834515.

The spelling of 1143123989 in words is "one billion, one hundred forty-three million, one hundred twenty-three thousand, nine hundred eighty-nine".