2209439 has 4 divisors (see below), whose sum is σ = 2339424. Its totient is φ = 2079456.

The previous prime is 2209421. The next prime is 2209447. The reversal of 2209439 is 9349022.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2209439 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 (2209409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64967 + ... + 65000.

It is an arithmetic number, because the mean of its divisors is an integer number (584856).

2^2209439 is an apocalyptic number.

2209439 is a deficient number, since it is larger than the sum of its proper divisors (129985).

2209439 is a wasteful number, since it uses less digits than its factorization.

2209439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129984.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 2209439 is about 1486.4181780374. The cubic root of 2209439 is about 130.2448835859.

The spelling of 2209439 in words is "two million, two hundred nine thousand, four hundred thirty-nine".