2009669 has 2 divisors, whose sum is σ = 2009670. Its totient is φ = 2009668.

The previous prime is 2009647. The next prime is 2009713. The reversal of 2009669 is 9669002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1181569 + 828100 = 1087^2 + 910^2 .

It is a cyclic number.

It is not a de Polignac number, because 2009669 - 2¹⁶ = 1944133 is a prime.

It is a super-2 number, since 2×2009669² = 8077538979122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2009639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1004834 + 1004835.

It is an arithmetic number, because the mean of its divisors is an integer number (1004835).

2^2009669 is an apocalyptic number.

It is an amenable number.

2009669 is a deficient number, since it is larger than the sum of its proper divisors (1).

2009669 is an equidigital number, since it uses as much as digits as its factorization.

2009669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 2009669 is about 1417.6279483701. The cubic root of 2009669 is about 126.1948149497.

The spelling of 2009669 in words is "two million, nine thousand, six hundred sixty-nine".