426809 has 4 divisors (see below), whose sum is σ = 434916. Its totient is φ = 418704.

The previous prime is 426799. The next prime is 426841. The reversal of 426809 is 908624.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 319225 + 107584 = 565^2 + 328^2 .

It is a cyclic number.

It is not a de Polignac number, because 426809 - 2⁸ = 426553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (426859) 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, 3974 + ... + 4079.

It is an arithmetic number, because the mean of its divisors is an integer number (108729).

2⁴²⁶⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

426809 is a deficient number, since it is larger than the sum of its proper divisors (8107).

426809 is an equidigital number, since it uses as much as digits as its factorization.

426809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8106.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 426809 is about 653.3062069198. The cubic root of 426809 is about 75.2912526795.

The spelling of 426809 in words is "four hundred twenty-six thousand, eight hundred nine".