1123503723 has 8 divisors (see below), whose sum is σ = 1664450000. Its totient is φ = 749002464.

The previous prime is 1123503721. The next prime is 1123503727. The reversal of 1123503723 is 3273053211.

It is not a de Polignac number, because 1123503723 - 2¹ = 1123503721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 41611249 = 1123503723 / (1 + 1 + 2 + 3 + 5 + 0 + 3 + 7 + 2 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123503721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20805598 + ... + 20805651.

It is an arithmetic number, because the mean of its divisors is an integer number (208056250).

Almost surely, 2^1123503723 is an apocalyptic number.

1123503723 is a deficient number, since it is larger than the sum of its proper divisors (540946277).

1123503723 is an equidigital number, since it uses as much as digits as its factorization.

1123503723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41611258 (or 41611252 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 1123503723 is about 33518.7070603864. The cubic root of 1123503723 is about 1039.5806133852.

Adding to 1123503723 its reverse (3273053211), we get a palindrome (4396556934).

The spelling of 1123503723 in words is "one billion, one hundred twenty-three million, five hundred three thousand, seven hundred twenty-three".