1123440613 has 4 divisors (see below), whose sum is σ = 1123561260. Its totient is φ = 1123319968.

The previous prime is 1123440611. The next prime is 1123440623. The reversal of 1123440613 is 3160443211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 898980289 + 224460324 = 29983^2 + 14982^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123440613 - 2¹ = 1123440611 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 (1123440611) 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, 45070 + ... + 65407.

It is an arithmetic number, because the mean of its divisors is an integer number (280890315).

Almost surely, 2^1123440613 is an apocalyptic number.

It is an amenable number.

1123440613 is a deficient number, since it is larger than the sum of its proper divisors (120647).

1123440613 is a wasteful number, since it uses less digits than its factorization.

1123440613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120646.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1123440613 is about 33517.7656325716. The cubic root of 1123440613 is about 1039.5611477440.

Adding to 1123440613 its reverse (3160443211), we get a palindrome (4283883824).

The spelling of 1123440613 in words is "one billion, one hundred twenty-three million, four hundred forty thousand, six hundred thirteen".