264209 has 4 divisors (see below), whose sum is σ = 288240. Its totient is φ = 240180.

The previous prime is 264179. The next prime is 264211. The reversal of 264209 is 902462.

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.

It is a cyclic number.

It is not a de Polignac number, because 264209 - 2⁸ = 263953 is a prime.

It is a d-powerful number, because it can be written as 2 + 6 + 2¹¹ + 4⁹ + 0 + 9 .

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (264269) 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, 11999 + ... + 12020.

It is an arithmetic number, because the mean of its divisors is an integer number (72060).

2²⁶⁴²⁰⁹ is an apocalyptic number.

It is an amenable number.

264209 is a deficient number, since it is larger than the sum of its proper divisors (24031).

264209 is a wasteful number, since it uses less digits than its factorization.

264209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24030.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 264209 is about 514.0126457588. The cubic root of 264209 is about 64.1676107880.

The spelling of 264209 in words is "two hundred sixty-four thousand, two hundred nine".