8470809 has 6 divisors (see below), whose sum is σ = 12235626. Its totient is φ = 5647200.

The previous prime is 8470801. The next prime is 8470829. The reversal of 8470809 is 9080748.

It can be written as a sum of positive squares in only one way, i.e., 6656400 + 1814409 = 2580^2 + 1347^2 .

It is not a de Polignac number, because 8470809 - 2³ = 8470801 is a prime.

It is a super-2 number, since 2×8470809² = 143509210228962, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8470801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 470592 + ... + 470609.

It is an arithmetic number, because the mean of its divisors is an integer number (2039271).

Almost surely, 2^8470809 is an apocalyptic number.

It is an amenable number.

8470809 is a deficient number, since it is larger than the sum of its proper divisors (3764817).

8470809 is a wasteful number, since it uses less digits than its factorization.

8470809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941207 (or 941204 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 8470809 is about 2910.4654266972. The cubic root of 8470809 is about 203.8488644125.

The spelling of 8470809 in words is "eight million, four hundred seventy thousand, eight hundred nine".