470809 has 4 divisors (see below), whose sum is σ = 477904. Its totient is φ = 463716.

The previous prime is 470791. The next prime is 470819. The reversal of 470809 is 908074.

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 470809 - 2⁹ = 470297 is a prime.

It is a super-2 number, since 2×470809² = 443322228962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (470819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3447 + ... + 3580.

It is an arithmetic number, because the mean of its divisors is an integer number (119476).

2⁴⁷⁰⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

470809 is a deficient number, since it is larger than the sum of its proper divisors (7095).

470809 is an equidigital number, since it uses as much as digits as its factorization.

470809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7094.

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

The square root of 470809 is about 686.1552302504. The cubic root of 470809 is about 77.7943850403.

It can be divided in two parts, 47080 and 9, that added together give a square (47089 = 217²).

The spelling of 470809 in words is "four hundred seventy thousand, eight hundred nine".