11609813 has 2 divisors, whose sum is σ = 11609814. Its totient is φ = 11609812.

The previous prime is 11609803. The next prime is 11609837. The reversal of 11609813 is 31890611.

It is a happy number.

11609813 is digitally balanced in base 2 and base 3, because in such bases 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., 6848689 + 4761124 = 2617^2 + 2182^2 .

It is an emirp because it is prime and its reverse (31890611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11609813 - 2⁴ = 11609797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11609803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5804906 + 5804907.

It is an arithmetic number, because the mean of its divisors is an integer number (5804907).

Almost surely, 2^11609813 is an apocalyptic number.

It is an amenable number.

11609813 is a deficient number, since it is larger than the sum of its proper divisors (1).

11609813 is an equidigital number, since it uses as much as digits as its factorization.

11609813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 11609813 is about 3407.3175666498. The cubic root of 11609813 is about 226.4340537059.

The spelling of 11609813 in words is "eleven million, six hundred nine thousand, eight hundred thirteen".