1103440013 has 4 divisors (see below), whose sum is σ = 1188320028. Its totient is φ = 1018560000.

The previous prime is 1103439989. The next prime is 1103440021. The reversal of 1103440013 is 3100443011.

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 164814244 + 938625769 = 12838^2 + 30637^2 .

It is a cyclic number.

It is not a de Polignac number, because 1103440013 - 2¹⁰ = 1103438989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1103439973 and 1103440000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103440213) 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, 42439988 + ... + 42440013.

It is an arithmetic number, because the mean of its divisors is an integer number (297080007).

Almost surely, 2^1103440013 is an apocalyptic number.

1103440013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1103440013 is a deficient number, since it is larger than the sum of its proper divisors (84880015).

1103440013 is an equidigital number, since it uses as much as digits as its factorization.

1103440013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84880014.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1103440013 is about 33218.0675687193. The cubic root of 1103440013 is about 1033.3550735512.

Adding to 1103440013 its reverse (3100443011), we get a palindrome (4203883024).

The spelling of 1103440013 in words is "one billion, one hundred three million, four hundred forty thousand, thirteen".