2443909 has 6 divisors (see below), whose sum is σ = 2646546. Its totient is φ = 2255760.

The previous prime is 2443901. The next prime is 2443927. The reversal of 2443909 is 9093442.

It can be written as a sum of positive squares in 3 ways, for example, as 184900 + 2259009 = 430^2 + 1503^2 .

It is not a de Polignac number, because 2443909 - 2³ = 2443901 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 4⁶ + 4⁹ + 3¹³ + 9 + 0 + 9⁵ .

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2443901) 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, 7062 + ... + 7399.

It is an arithmetic number, because the mean of its divisors is an integer number (441091).

2^2443909 is an apocalyptic number.

It is an amenable number.

2443909 is a deficient number, since it is larger than the sum of its proper divisors (202637).

2443909 is a wasteful number, since it uses less digits than its factorization.

2443909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14487 (or 14474 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 2443909 is about 1563.3006748543. The cubic root of 2443909 is about 134.6981642441.

The spelling of 2443909 in words is "two million, four hundred forty-three thousand, nine hundred nine".