809487 has 16 divisors (see below), whose sum is σ = 1370880. Its totient is φ = 462456.

The previous prime is 809461. The next prime is 809491. The reversal of 809487 is 784908.

809487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 809487 - 2⁶ = 809423 is a prime.

809487 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 809487.

It is not an unprimeable number, because it can be changed into a prime (809407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1953 + ... + 2330.

It is an arithmetic number, because the mean of its divisors is an integer number (85680).

2⁸⁰⁹⁴⁸⁷ is an apocalyptic number.

809487 is a deficient number, since it is larger than the sum of its proper divisors (561393).

809487 is a wasteful number, since it uses less digits than its factorization.

809487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4299 (or 4293 counting only the distinct ones).

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

The square root of 809487 is about 899.7149548607. The cubic root of 809487 is about 93.1972918835.

It can be divided in two parts, 809 and 487, that added together give a 4-th power (1296 = 6⁴).

The spelling of 809487 in words is "eight hundred nine thousand, four hundred eighty-seven".