704909 has 4 divisors (see below), whose sum is σ = 727680. Its totient is φ = 682140.

The previous prime is 704897. The next prime is 704929. The reversal of 704909 is 909407.

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: 909407 = 43 ⋅21149.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-704909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (704929) 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, 11339 + ... + 11400.

It is an arithmetic number, because the mean of its divisors is an integer number (181920).

2⁷⁰⁴⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

704909 is a deficient number, since it is larger than the sum of its proper divisors (22771).

704909 is a wasteful number, since it uses less digits than its factorization.

704909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22770.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 704909 is about 839.5885897271. The cubic root of 704909 is about 88.9974749946.

It can be divided in two parts, 704 and 909, that multiplied together give a palindrome (639936).

The spelling of 704909 in words is "seven hundred four thousand, nine hundred nine".