80609 has 4 divisors (see below), whose sum is σ = 81300. Its totient is φ = 79920.

The previous prime is 80603. The next prime is 80611. The reversal of 80609 is 90608.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 19600 + 61009 = 140^2 + 247^2 .

It is a cyclic number.

It is not a de Polignac number, because 80609 - 2¹⁶ = 15073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80603) 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, 122 + ... + 419.

It is an arithmetic number, because the mean of its divisors is an integer number (20325).

2⁸⁰⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

80609 is a deficient number, since it is larger than the sum of its proper divisors (691).

80609 is a wasteful number, since it uses less digits than its factorization.

80609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 80609 is about 283.9172414631. The cubic root of 80609 is about 43.1977550845.

Subtracting 80609 from its reverse (90608), we obtain a palindrome (9999).

The spelling of 80609 in words is "eighty thousand, six hundred nine".