2079809 has 4 divisors (see below), whose sum is σ = 2115120. Its totient is φ = 2044500.

The previous prime is 2079787. The next prime is 2079811. The reversal of 2079809 is 9089702.

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 a cyclic number.

It is not a de Polignac number, because 2079809 - 2¹² = 2075713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2079839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17567 + ... + 17684.

It is an arithmetic number, because the mean of its divisors is an integer number (528780).

2^2079809 is an apocalyptic number.

It is an amenable number.

2079809 is a deficient number, since it is larger than the sum of its proper divisors (35311).

2079809 is an equidigital number, since it uses as much as digits as its factorization.

2079809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35310.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 2079809 is about 1442.1542913295. The cubic root of 2079809 is about 127.6461786194.

The spelling of 2079809 in words is "two million, seventy-nine thousand, eight hundred nine".