805489 has 4 divisors (see below), whose sum is σ = 807424. Its totient is φ = 803556.

The previous prime is 805487. The next prime is 805499. The reversal of 805489 is 984508.

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 805489 - 2¹ = 805487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (805487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57 + ... + 1270.

It is an arithmetic number, because the mean of its divisors is an integer number (201856).

2⁸⁰⁵⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

805489 is a deficient number, since it is larger than the sum of its proper divisors (1935).

805489 is a wasteful number, since it uses less digits than its factorization.

805489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1934.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 805489 is about 897.4903899207. The cubic root of 805489 is about 93.0436069442.

The spelling of 805489 in words is "eight hundred five thousand, four hundred eighty-nine".