2648209 has 4 divisors (see below), whose sum is σ = 2804004. Its totient is φ = 2492416.

The previous prime is 2648207. The next prime is 2648213. The reversal of 2648209 is 9028462.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1617984 + 1030225 = 1272^2 + 1015^2 .

It is a cyclic number.

It is not a de Polignac number, because 2648209 - 2¹ = 2648207 is a prime.

It is a Duffinian number.

2648209 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2648207) 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, 77872 + ... + 77905.

It is an arithmetic number, because the mean of its divisors is an integer number (701001).

2^2648209 is an apocalyptic number.

It is an amenable number.

2648209 is a deficient number, since it is larger than the sum of its proper divisors (155795).

2648209 is a wasteful number, since it uses less digits than its factorization.

2648209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155794.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 2648209 is about 1627.3318653551. The cubic root of 2648209 is about 138.3515680548.

The spelling of 2648209 in words is "two million, six hundred forty-eight thousand, two hundred nine".