209097 has 12 divisors (see below), whose sum is σ = 345280. Its totient is φ = 119448.

The previous prime is 209089. The next prime is 209123. The reversal of 209097 is 790902.

It is not a de Polignac number, because 209097 - 2³ = 209089 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 209097.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209497) 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, 1597 + ... + 1722.

2²⁰⁹⁰⁹⁷ is an apocalyptic number.

It is an amenable number.

209097 is a deficient number, since it is larger than the sum of its proper divisors (136183).

209097 is a wasteful number, since it uses less digits than its factorization.

209097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3332 (or 3329 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 209097 is about 457.2712542901. The cubic root of 209097 is about 59.3539009058.

Adding to 209097 its reverse (790902), we get a palindrome (999999).

It can be divided in two parts, 2090 and 97, that added together give a 7-th power (2187 = 3⁷).

The spelling of 209097 in words is "two hundred nine thousand, ninety-seven".