704809 has 8 divisors (see below), whose sum is σ = 813888. Its totient is φ = 597840.

The previous prime is 704807. The next prime is 704819. The reversal of 704809 is 908407.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 704809 - 2¹ = 704807 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (704801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279 + ... + 1219.

It is an arithmetic number, because the mean of its divisors is an integer number (101736).

2⁷⁰⁴⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

704809 is a deficient number, since it is larger than the sum of its proper divisors (109079).

704809 is a wasteful number, since it uses less digits than its factorization.

704809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 704809 is about 839.5290346379. The cubic root of 704809 is about 88.9932663340.

The spelling of 704809 in words is "seven hundred four thousand, eight hundred nine".