209249 has 2 divisors, whose sum is σ = 209250. Its totient is φ = 209248.

The previous prime is 209233. The next prime is 209257. The reversal of 209249 is 942902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208849 + 400 = 457^2 + 20^2 .

It is a cyclic number.

It is not a de Polignac number, because 209249 - 2⁴ = 209233 is a prime.

It is a nialpdrome in base 13.

It is not a weakly prime, because it can be changed into another prime (209269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104624 + 104625.

It is an arithmetic number, because the mean of its divisors is an integer number (104625).

2²⁰⁹²⁴⁹ is an apocalyptic number.

It is an amenable number.

209249 is a deficient number, since it is larger than the sum of its proper divisors (1).

209249 is an equidigital number, since it uses as much as digits as its factorization.

209249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 209249 is about 457.4374274149. The cubic root of 209249 is about 59.3682795718.

The spelling of 209249 in words is "two hundred nine thousand, two hundred forty-nine".