1123863409 has 4 divisors (see below), whose sum is σ = 1137404016. Its totient is φ = 1110322804.

The previous prime is 1123863383. The next prime is 1123863457. The reversal of 1123863409 is 9043683211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1123863409 - 2¹⁵ = 1123830641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123863469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6770179 + ... + 6770344.

It is an arithmetic number, because the mean of its divisors is an integer number (284351004).

Almost surely, 2^1123863409 is an apocalyptic number.

It is an amenable number.

1123863409 is a deficient number, since it is larger than the sum of its proper divisors (13540607).

1123863409 is an equidigital number, since it uses as much as digits as its factorization.

1123863409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13540606.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 1123863409 is about 33524.0720826095. The cubic root of 1123863409 is about 1039.6915409797.

It can be divided in two parts, 11238 and 63409, that added together give a palindrome (74647).

The spelling of 1123863409 in words is "one billion, one hundred twenty-three million, eight hundred sixty-three thousand, four hundred nine".