809427 has 8 divisors (see below), whose sum is σ = 1095616. Its totient is φ = 531432.

The previous prime is 809423. The next prime is 809437. The reversal of 809427 is 724908.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 809427 - 2² = 809423 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 809394 and 809403.

It is not an unprimeable number, because it can be changed into a prime (809423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1813 + ... + 2214.

It is an arithmetic number, because the mean of its divisors is an integer number (136952).

2⁸⁰⁹⁴²⁷ is an apocalyptic number.

809427 is a deficient number, since it is larger than the sum of its proper divisors (286189).

809427 is a wasteful number, since it uses less digits than its factorization.

809427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4097.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 809427 is about 899.6816103489. The cubic root of 809427 is about 93.1949892005.

The spelling of 809427 in words is "eight hundred nine thousand, four hundred twenty-seven".