1123187143 has 4 divisors (see below), whose sum is σ = 1209586168. Its totient is φ = 1036788120.

The previous prime is 1123187123. The next prime is 1123187167. The reversal of 1123187143 is 3417813211.

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 1123187143 - 2¹³ = 1123178951 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 (1123187113) 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 3 ways as a sum of consecutive naturals, for example, 43199493 + ... + 43199518.

It is an arithmetic number, because the mean of its divisors is an integer number (302396542).

Almost surely, 2^1123187143 is an apocalyptic number.

1123187143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1123187143 is a deficient number, since it is larger than the sum of its proper divisors (86399025).

1123187143 is an equidigital number, since it uses as much as digits as its factorization.

1123187143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86399024.

The product of its digits is 4032, while the sum is 31.

The square root of 1123187143 is about 33513.9842901437. The cubic root of 1123187143 is about 1039.4829601417.

The spelling of 1123187143 in words is "one billion, one hundred twenty-three million, one hundred eighty-seven thousand, one hundred forty-three".