11768509 has 2 divisors, whose sum is σ = 11768510. Its totient is φ = 11768508.

The previous prime is 11768489. The next prime is 11768513. The reversal of 11768509 is 90586711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6579225 + 5189284 = 2565^2 + 2278^2 .

It is an emirp because it is prime and its reverse (90586711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11768509 - 2¹⁹ = 11244221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11768569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5884254 + 5884255.

It is an arithmetic number, because the mean of its divisors is an integer number (5884255).

Almost surely, 2^11768509 is an apocalyptic number.

It is an amenable number.

11768509 is a deficient number, since it is larger than the sum of its proper divisors (1).

11768509 is an equidigital number, since it uses as much as digits as its factorization.

11768509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 11768509 is about 3430.5260529546. The cubic root of 11768509 is about 227.4611067433.

The spelling of 11768509 in words is "eleven million, seven hundred sixty-eight thousand, five hundred nine".