11605513 has 2 divisors, whose sum is σ = 11605514. Its totient is φ = 11605512.

The previous prime is 11605499. The next prime is 11605519. The reversal of 11605513 is 31550611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6822544 + 4782969 = 2612^2 + 2187^2 .

It is an emirp because it is prime and its reverse (31550611) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11605513 is a prime.

It is not a weakly prime, because it can be changed into another prime (11605519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5802756 + 5802757.

It is an arithmetic number, because the mean of its divisors is an integer number (5802757).

Almost surely, 2^11605513 is an apocalyptic number.

It is an amenable number.

11605513 is a deficient number, since it is larger than the sum of its proper divisors (1).

11605513 is an equidigital number, since it uses as much as digits as its factorization.

11605513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 11605513 is about 3406.6865133147. The cubic root of 11605513 is about 226.4060949821.

The spelling of 11605513 in words is "eleven million, six hundred five thousand, five hundred thirteen".