1166609 has 2 divisors, whose sum is σ = 1166610. Its totient is φ = 1166608.

The previous prime is 1166603. The next prime is 1166617. The reversal of 1166609 is 9066611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 672400 + 494209 = 820^2 + 703^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166609 - 2²⁰ = 118033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1166603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583304 + 583305.

It is an arithmetic number, because the mean of its divisors is an integer number (583305).

2^1166609 is an apocalyptic number.

It is an amenable number.

1166609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166609 is an equidigital number, since it uses as much as digits as its factorization.

1166609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 1166609 is about 1080.0967549252. The cubic root of 1166609 is about 105.2709254400.

The spelling of 1166609 in words is "one million, one hundred sixty-six thousand, six hundred nine".