2016309 has 4 divisors (see below), whose sum is σ = 2688416. Its totient is φ = 1344204.

The previous prime is 2016293. The next prime is 2016323. The reversal of 2016309 is 9036102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2016309 - 2⁴ = 2016293 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2016349) 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 in 3 ways as a sum of consecutive naturals, for example, 336049 + ... + 336054.

It is an arithmetic number, because the mean of its divisors is an integer number (672104).

2^2016309 is an apocalyptic number.

It is an amenable number.

2016309 is a deficient number, since it is larger than the sum of its proper divisors (672107).

2016309 is an equidigital number, since it uses as much as digits as its factorization.

2016309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672106.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 2016309 is about 1419.9679573850. The cubic root of 2016309 is about 126.3336458401. Note that the first 3 decimals are identical.

The spelling of 2016309 in words is "two million, sixteen thousand, three hundred nine".