1123564039 has 4 divisors (see below), whose sum is σ = 1209992056. Its totient is φ = 1037136024.

The previous prime is 1123564037. The next prime is 1123564049. The reversal of 1123564039 is 9304653211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9304653211 = 7 ⋅1329236173.

It is a cyclic number.

It is not a de Polignac number, because 1123564039 - 2¹ = 1123564037 is a prime.

It is a super-2 number, since 2×1123564039² = 2524792299467987042, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1123563995 and 1123564013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123564037) 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, 43213989 + ... + 43214014.

It is an arithmetic number, because the mean of its divisors is an integer number (302498014).

Almost surely, 2^1123564039 is an apocalyptic number.

1123564039 is a deficient number, since it is larger than the sum of its proper divisors (86428017).

1123564039 is an equidigital number, since it uses as much as digits as its factorization.

1123564039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86428016.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 1123564039 is about 33519.6067846865. The cubic root of 1123564039 is about 1039.5992165640.

The spelling of 1123564039 in words is "one billion, one hundred twenty-three million, five hundred sixty-four thousand, thirty-nine".