2078209 has 16 divisors (see below), whose sum is σ = 2507776. Its totient is φ = 1684800.

The previous prime is 2078207. The next prime is 2078221. The reversal of 2078209 is 9028702.

It is a cyclic number.

It is not a de Polignac number, because 2078209 - 2¹ = 2078207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2078207) 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 15 ways as a sum of consecutive naturals, for example, 13159 + ... + 13315.

It is an arithmetic number, because the mean of its divisors is an integer number (156736).

2^2078209 is an apocalyptic number.

It is an amenable number.

2078209 is a deficient number, since it is larger than the sum of its proper divisors (429567).

2078209 is a wasteful number, since it uses less digits than its factorization.

2078209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 2078209 is about 1441.5994589344. The cubic root of 2078209 is about 127.6134374269.

The spelling of 2078209 in words is "two million, seventy-eight thousand, two hundred nine".