2016909 has 6 divisors (see below), whose sum is σ = 2913326. Its totient is φ = 1344600.

The previous prime is 2016881. The next prime is 2016919. The reversal of 2016909 is 9096102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1814409 + 202500 = 1347^2 + 450^2 .

It is not a de Polignac number, because 2016909 - 2⁵ = 2016877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2016919) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 112042 + ... + 112059.

2^2016909 is an apocalyptic number.

It is an amenable number.

2016909 is a deficient number, since it is larger than the sum of its proper divisors (896417).

2016909 is a wasteful number, since it uses less digits than its factorization.

2016909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224107 (or 224104 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 2016909 is about 1420.1792140431. The cubic root of 2016909 is about 126.3461757764.

The spelling of 2016909 in words is "two million, sixteen thousand, nine hundred nine".