1143823 has 4 divisors (see below), whose sum is σ = 1157688. Its totient is φ = 1129960.

The previous prime is 1143817. The next prime is 1143829. The reversal of 1143823 is 3283411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3283411 = 23 ⋅142757.

It is an interprime number because it is at equal distance from previous prime (1143817) and next prime (1143829).

It is a cyclic number.

It is not a de Polignac number, because 1143823 - 2¹⁷ = 1012751 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1143794 and 1143803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143829) 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, 6808 + ... + 6973.

It is an arithmetic number, because the mean of its divisors is an integer number (289422).

2^1143823 is an apocalyptic number.

1143823 is a deficient number, since it is larger than the sum of its proper divisors (13865).

1143823 is an equidigital number, since it uses as much as digits as its factorization.

1143823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13864.

The product of its digits is 576, while the sum is 22.

The square root of 1143823 is about 1069.4966105603. The cubic root of 1143823 is about 104.5810364763.

It can be divided in two parts, 11 and 43823, that added together give a palindrome (43834).

The spelling of 1143823 in words is "one million, one hundred forty-three thousand, eight hundred twenty-three".