16966009 has 2 divisors, whose sum is σ = 16966010. Its totient is φ = 16966008.

The previous prime is 16966007. The next prime is 16966039. The reversal of 16966009 is 90066961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16687225 + 278784 = 4085^2 + 528^2 .

It is a cyclic number.

It is not a de Polignac number, because 16966009 - 2¹ = 16966007 is a prime.

It is a super-2 number, since 2×16966009² = 575690922776162, which contains 22 as substring.

Together with 16966007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16966007) 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, 8483004 + 8483005.

It is an arithmetic number, because the mean of its divisors is an integer number (8483005).

Almost surely, 2^16966009 is an apocalyptic number.

It is an amenable number.

16966009 is a deficient number, since it is larger than the sum of its proper divisors (1).

16966009 is an equidigital number, since it uses as much as digits as its factorization.

16966009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 16966009 is about 4118.9815488783. The cubic root of 16966009 is about 256.9566713229.

The spelling of 16966009 in words is "sixteen million, nine hundred sixty-six thousand, nine".