11819609 has 2 divisors, whose sum is σ = 11819610. Its totient is φ = 11819608.

The previous prime is 11819597. The next prime is 11819611. The reversal of 11819609 is 90691811.

11819609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7997584 + 3822025 = 2828^2 + 1955^2 .

It is a cyclic number.

It is not a de Polignac number, because 11819609 - 2⁴ = 11819593 is a prime.

Together with 11819611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11819629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5909804 + 5909805.

It is an arithmetic number, because the mean of its divisors is an integer number (5909805).

Almost surely, 2^11819609 is an apocalyptic number.

It is an amenable number.

11819609 is a deficient number, since it is larger than the sum of its proper divisors (1).

11819609 is an equidigital number, since it uses as much as digits as its factorization.

11819609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 11819609 is about 3437.9658229831. The cubic root of 11819609 is about 227.7898507360.

The spelling of 11819609 in words is "eleven million, eight hundred nineteen thousand, six hundred nine".