2009439 has 12 divisors (see below), whose sum is σ = 3003000. Its totient is φ = 1293264.

The previous prime is 2009437. The next prime is 2009461. The reversal of 2009439 is 9349002.

It is not a de Polignac number, because 2009439 - 2¹ = 2009437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3589 + ... + 4110.

It is an arithmetic number, because the mean of its divisors is an integer number (250250).

2^2009439 is an apocalyptic number.

2009439 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2009439 is a deficient number, since it is larger than the sum of its proper divisors (993561).

2009439 is a wasteful number, since it uses less digits than its factorization.

2009439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7734 (or 7731 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 2009439 is about 1417.5468246234. The cubic root of 2009439 is about 126.1900005723.

The spelling of 2009439 in words is "two million, nine thousand, four hundred thirty-nine".