1123506663 has 4 divisors (see below), whose sum is σ = 1498008888. Its totient is φ = 749004440.

The previous prime is 1123506653. The next prime is 1123506749. The reversal of 1123506663 is 3666053211.

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 1123506663 - 2⁸ = 1123506407 is a prime.

It is a super-3 number, since 3×1123506663³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123506653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187251108 + ... + 187251113.

It is an arithmetic number, because the mean of its divisors is an integer number (374502222).

Almost surely, 2^1123506663 is an apocalyptic number.

1123506663 is a deficient number, since it is larger than the sum of its proper divisors (374502225).

1123506663 is an equidigital number, since it uses as much as digits as its factorization.

1123506663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374502224.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 1123506663 is about 33518.7509164647. The cubic root of 1123506663 is about 1039.5815201806.

Adding to 1123506663 its reverse (3666053211), we get a palindrome (4789559874).

The spelling of 1123506663 in words is "one billion, one hundred twenty-three million, five hundred six thousand, six hundred sixty-three".