2002909 has 4 divisors (see below), whose sum is σ = 2090016. Its totient is φ = 1915804.

The previous prime is 2002907. The next prime is 2002919. The reversal of 2002909 is 9092002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9092002 = 2 ⋅4546001.

It is a cyclic number.

It is not a de Polignac number, because 2002909 - 2¹ = 2002907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2002909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002907) 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, 43519 + ... + 43564.

It is an arithmetic number, because the mean of its divisors is an integer number (522504).

2^2002909 is an apocalyptic number.

It is an amenable number.

2002909 is a deficient number, since it is larger than the sum of its proper divisors (87107).

2002909 is an equidigital number, since it uses as much as digits as its factorization.

2002909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87106.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 2002909 is about 1415.2416754745. The cubic root of 2002909 is about 126.0531605695.

The spelling of 2002909 in words is "two million, two thousand, nine hundred nine".