2002439 has 4 divisors (see below), whose sum is σ = 2020920. Its totient is φ = 1983960.

The previous prime is 2002417. The next prime is 2002453. The reversal of 2002439 is 9342002.

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

It is a cyclic number.

It is not a de Polignac number, because 2002439 - 2¹² = 1998343 is a prime.

It is a Duffinian number.

2002439 is a modest number, since divided by 2439 gives 20 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 2002439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9077 + ... + 9294.

It is an arithmetic number, because the mean of its divisors is an integer number (505230).

2^2002439 is an apocalyptic number.

2002439 is a deficient number, since it is larger than the sum of its proper divisors (18481).

2002439 is a wasteful number, since it uses less digits than its factorization.

2002439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18480.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 2002439 is about 1415.0756163541. The cubic root of 2002439 is about 126.0432999750.

It can be divided in two parts, 2002 and 439, that multiplied together give a palindrome (878878).

The spelling of 2002439 in words is "two million, two thousand, four hundred thirty-nine".