809469 has 12 divisors (see below), whose sum is σ = 1191996. Its totient is φ = 529152.

The previous prime is 809461. The next prime is 809491. The reversal of 809469 is 964908.

It can be written as a sum of positive squares in 2 ways, for example, as 700569 + 108900 = 837^2 + 330^2 .

It is not a de Polignac number, because 809469 - 2³ = 809461 is a prime.

It is a super-2 number, since 2×809469² = 1310480123922, which contains 22 as substring.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 372 + ... + 1325.

It is an arithmetic number, because the mean of its divisors is an integer number (99333).

2⁸⁰⁹⁴⁶⁹ is an apocalyptic number.

It is an amenable number.

809469 is a deficient number, since it is larger than the sum of its proper divisors (382527).

809469 is a wasteful number, since it uses less digits than its factorization.

809469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756 (or 1753 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 809469 is about 899.7049516369. The cubic root of 809469 is about 93.1966010905.

The spelling of 809469 in words is "eight hundred nine thousand, four hundred sixty-nine".