809471 has 8 divisors (see below), whose sum is σ = 885024. Its totient is φ = 735840.

The previous prime is 809461. The next prime is 809491. The reversal of 809471 is 174908.

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 809471 - 2⁶ = 809407 is a prime.

It is a super-3 number, since 3×809471³ = 1591201347496782333, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809401) 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, 485 + ... + 1361.

It is an arithmetic number, because the mean of its divisors is an integer number (110628).

2⁸⁰⁹⁴⁷¹ is an apocalyptic number.

809471 is a deficient number, since it is larger than the sum of its proper divisors (75553).

809471 is a wasteful number, since it uses less digits than its factorization.

809471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 809471 is about 899.7060631117. The cubic root of 809471 is about 93.1966778458.

The spelling of 809471 in words is "eight hundred nine thousand, four hundred seventy-one".