11113813 has 2 divisors, whose sum is σ = 11113814. Its totient is φ = 11113812.

The previous prime is 11113793. The next prime is 11113849. The reversal of 11113813 is 31831111.

11113813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6265009 + 4848804 = 2503^2 + 2202^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11113813 is a prime.

It is a nialpdrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11113213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556906 + 5556907.

It is an arithmetic number, because the mean of its divisors is an integer number (5556907).

Almost surely, 2^11113813 is an apocalyptic number.

It is an amenable number.

11113813 is a deficient number, since it is larger than the sum of its proper divisors (1).

11113813 is an equidigital number, since it uses as much as digits as its factorization.

11113813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 19.

The square root of 11113813 is about 3333.7385920315. The cubic root of 11113813 is about 223.1624025627.

Adding to 11113813 its reverse (31831111), we get a palindrome (42944924).

It can be divided in two parts, 111 and 13813, that added together give a square (13924 = 118²).

The spelling of 11113813 in words is "eleven million, one hundred thirteen thousand, eight hundred thirteen".