1123648813 has 32 divisors (see below), whose sum is σ = 1395138816. Its totient is φ = 883104768.

The previous prime is 1123648811. The next prime is 1123648817. The reversal of 1123648813 is 3188463211.

It is not a de Polignac number, because 1123648813 - 2¹ = 1123648811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123648811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1027495 + ... + 1028587.

It is an arithmetic number, because the mean of its divisors is an integer number (43598088).

Almost surely, 2^1123648813 is an apocalyptic number.

It is an amenable number.

1123648813 is a deficient number, since it is larger than the sum of its proper divisors (271490003).

1123648813 is a wasteful number, since it uses less digits than its factorization.

1123648813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333.

The product of its digits is 27648, while the sum is 37.

The square root of 1123648813 is about 33520.8713043083. The cubic root of 1123648813 is about 1039.6253621640.

The spelling of 1123648813 in words is "one billion, one hundred twenty-three million, six hundred forty-eight thousand, eight hundred thirteen".