1123663 has 4 divisors (see below), whose sum is σ = 1162440. Its totient is φ = 1084888.

The previous prime is 1123651. The next prime is 1123667. The reversal of 1123663 is 3663211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3663211 = 17 ⋅215483.

It is a cyclic number.

It is not a de Polignac number, because 1123663 - 2⁵ = 1123631 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 (1123667) 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, 19345 + ... + 19402.

It is an arithmetic number, because the mean of its divisors is an integer number (290610).

2^1123663 is an apocalyptic number.

1123663 is a deficient number, since it is larger than the sum of its proper divisors (38777).

1123663 is an equidigital number, since it uses as much as digits as its factorization.

1123663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38776.

The product of its digits is 648, while the sum is 22.

The square root of 1123663 is about 1060.0297165646. The cubic root of 1123663 is about 103.9629737524.

Adding to 1123663 its reverse (3663211), we get a palindrome (4786874).

The spelling of 1123663 in words is "one million, one hundred twenty-three thousand, six hundred sixty-three".