11540609 has 2 divisors, whose sum is σ = 11540610. Its totient is φ = 11540608.

The previous prime is 11540597. The next prime is 11540611. The reversal of 11540609 is 90604511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9985600 + 1555009 = 3160^2 + 1247^2 .

It is a cyclic number.

It is not a de Polignac number, because 11540609 - 2²⁰ = 10492033 is a prime.

Together with 11540611, 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 (11549609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5770304 + 5770305.

It is an arithmetic number, because the mean of its divisors is an integer number (5770305).

Almost surely, 2^11540609 is an apocalyptic number.

It is an amenable number.

11540609 is a deficient number, since it is larger than the sum of its proper divisors (1).

11540609 is an equidigital number, since it uses as much as digits as its factorization.

11540609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 11540609 is about 3397.1471855073. The cubic root of 11540609 is about 225.9832459452.

The spelling of 11540609 in words is "eleven million, five hundred forty thousand, six hundred nine".