1123734539 has 4 divisors (see below), whose sum is σ = 1123806840. Its totient is φ = 1123662240.

The previous prime is 1123734533. The next prime is 1123734541. The reversal of 1123734539 is 9354373211.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9354373211 = 139 ⋅67297649.

It is a cyclic number.

It is not a de Polignac number, because 1123734539 - 2²⁴ = 1106957323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123734533) 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, 2222 + ... + 47459.

It is an arithmetic number, because the mean of its divisors is an integer number (280951710).

Almost surely, 2^1123734539 is an apocalyptic number.

1123734539 is a deficient number, since it is larger than the sum of its proper divisors (72301).

1123734539 is an equidigital number, since it uses as much as digits as its factorization.

1123734539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72300.

The product of its digits is 68040, while the sum is 38.

The square root of 1123734539 is about 33522.1499757996. The cubic root of 1123734539 is about 1039.6518000380.

The spelling of 1123734539 in words is "one billion, one hundred twenty-three million, seven hundred thirty-four thousand, five hundred thirty-nine".