1123143193 has 4 divisors (see below), whose sum is σ = 1144334628. Its totient is φ = 1101951760.

The previous prime is 1123143173. The next prime is 1123143253. The reversal of 1123143193 is 3913413211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3913413211 = 15091 ⋅259321.

It can be written as a sum of positive squares in 2 ways, for example, as 562021849 + 561121344 = 23707^2 + 23688^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123143193 is a prime.

It is a super-2 number, since 2×1123143193² = 2522901263964470498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123143173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10595638 + ... + 10595743.

It is an arithmetic number, because the mean of its divisors is an integer number (286083657).

Almost surely, 2^1123143193 is an apocalyptic number.

It is an amenable number.

1123143193 is a deficient number, since it is larger than the sum of its proper divisors (21191435).

1123143193 is an equidigital number, since it uses as much as digits as its factorization.

1123143193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21191434.

The product of its digits is 1944, while the sum is 28.

The square root of 1123143193 is about 33513.3285872949. The cubic root of 1123143193 is about 1039.4694017387.

The spelling of 1123143193 in words is "one billion, one hundred twenty-three million, one hundred forty-three thousand, one hundred ninety-three".