1123789 has 4 divisors (see below), whose sum is σ = 1128124. Its totient is φ = 1119456.

The previous prime is 1123777. The next prime is 1123807. The reversal of 1123789 is 9873211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 372100 + 751689 = 610^2 + 867^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123789 - 2¹⁵ = 1091021 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10 and base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1123789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123709) 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, 1752 + ... + 2305.

It is an arithmetic number, because the mean of its divisors is an integer number (282031).

2^1123789 is an apocalyptic number.

It is an amenable number.

1123789 is a deficient number, since it is larger than the sum of its proper divisors (4335).

1123789 is an equidigital number, since it uses as much as digits as its factorization.

1123789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4334.

The product of its digits is 3024, while the sum is 31.

The square root of 1123789 is about 1060.0891471947. The cubic root of 1123789 is about 103.9668595097.

The spelling of 1123789 in words is "one million, one hundred twenty-three thousand, seven hundred eighty-nine".