209043 has 6 divisors (see below), whose sum is σ = 301964. Its totient is φ = 139356.

The previous prime is 209039. The next prime is 209063. The reversal of 209043 is 340902.

It is not a de Polignac number, because 209043 - 2² = 209039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209063) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11605 + ... + 11622.

2²⁰⁹⁰⁴³ is an apocalyptic number.

209043 is a deficient number, since it is larger than the sum of its proper divisors (92921).

209043 is a wasteful number, since it uses less digits than its factorization.

209043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23233 (or 23230 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 209043 is about 457.2122045615. The cubic root of 209043 is about 59.3487910181.

Adding to 209043 its reverse (340902), we get a palindrome (549945).

The spelling of 209043 in words is "two hundred nine thousand, forty-three".