2708009 has 6 divisors (see below), whose sum is σ = 2784894. Its totient is φ = 2631680.

The previous prime is 2707987. The next prime is 2708053. The reversal of 2708009 is 9008072.

It can be written as a sum of positive squares in 3 ways, for example, as 1315609 + 1392400 = 1147^2 + 1180^2 .

It is not a de Polignac number, because 2708009 - 2¹⁶ = 2642473 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 (2708099) 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, 10409 + ... + 10665.

It is an arithmetic number, because the mean of its divisors is an integer number (464149).

2^2708009 is an apocalyptic number.

It is an amenable number.

2708009 is a deficient number, since it is larger than the sum of its proper divisors (76885).

2708009 is an frugal number, since it uses more digits than its factorization.

2708009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 2708009 is about 1645.6029290202. The cubic root of 2708009 is about 139.3852123735.

The spelling of 2708009 in words is "two million, seven hundred eight thousand, nine".