2009143 has 4 divisors (see below), whose sum is σ = 2013088. Its totient is φ = 2005200.

The previous prime is 2009113. The next prime is 2009167. The reversal of 2009143 is 3419002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3419002 = 2 ⋅1709501.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2009143 is a prime.

It is a Duffinian number.

2009143 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2009143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009113) 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, 1071 + ... + 2272.

It is an arithmetic number, because the mean of its divisors is an integer number (503272).

2^2009143 is an apocalyptic number.

2009143 is a deficient number, since it is larger than the sum of its proper divisors (3945).

2009143 is an equidigital number, since it uses as much as digits as its factorization.

2009143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 2009143 is about 1417.4424150561. The cubic root of 2009143 is about 126.1838041373.

The spelling of 2009143 in words is "two million, nine thousand, one hundred forty-three".