704209 has 4 divisors (see below), whose sum is σ = 768240. Its totient is φ = 640180.

The previous prime is 704189. The next prime is 704213. The reversal of 704209 is 902407.

704209 = 248² + 249² + ... + 258².

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, and also an emirpimes, since its reverse is a distinct semiprime: 902407 = 11 ⋅82037.

It is a cyclic number.

It is not a de Polignac number, because 704209 - 2⁵ = 704177 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 704209.

It is not an unprimeable number, because it can be changed into a prime (704219) 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, 31999 + ... + 32020.

It is an arithmetic number, because the mean of its divisors is an integer number (192060).

2⁷⁰⁴²⁰⁹ is an apocalyptic number.

It is an amenable number.

704209 is a deficient number, since it is larger than the sum of its proper divisors (64031).

704209 is a wasteful number, since it uses less digits than its factorization.

704209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64030.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 704209 is about 839.1716153446. The cubic root of 704209 is about 88.9680060063.

The spelling of 704209 in words is "seven hundred four thousand, two hundred nine".