11161609 has 2 divisors, whose sum is σ = 11161610. Its totient is φ = 11161608.

The previous prime is 11161603. The next prime is 11161613. The reversal of 11161609 is 90616111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10705984 + 455625 = 3272^2 + 675^2 .

It is a cyclic number.

It is not a de Polignac number, because 11161609 - 2⁹ = 11161097 is a prime.

It is not a weakly prime, because it can be changed into another prime (11161603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5580804 + 5580805.

It is an arithmetic number, because the mean of its divisors is an integer number (5580805).

Almost surely, 2^11161609 is an apocalyptic number.

It is an amenable number.

11161609 is a deficient number, since it is larger than the sum of its proper divisors (1).

11161609 is an equidigital number, since it uses as much as digits as its factorization.

11161609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 11161609 is about 3340.8994297943. The cubic root of 11161609 is about 223.4818553669.

The spelling of 11161609 in words is "eleven million, one hundred sixty-one thousand, six hundred nine".