1606009 has 2 divisors, whose sum is σ = 1606010. Its totient is φ = 1606008.

The previous prime is 1605979. The next prime is 1606081. The reversal of 1606009 is 9006061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1010025 + 595984 = 1005^2 + 772^2 .

It is an emirp because it is prime and its reverse (9006061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1606009 - 2⁷ = 1605881 is a prime.

1606009 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1606309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803004 + 803005.

It is an arithmetic number, because the mean of its divisors is an integer number (803005).

2^1606009 is an apocalyptic number.

It is an amenable number.

1606009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606009 is an equidigital number, since it uses as much as digits as its factorization.

1606009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1606009 is about 1267.2841039009. The cubic root of 1606009 is about 117.1069467985.

The spelling of 1606009 in words is "one million, six hundred six thousand, nine".