676509 has 4 divisors (see below), whose sum is σ = 902016. Its totient is φ = 451004.

The previous prime is 676493. The next prime is 676523. The reversal of 676509 is 905676.

676509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 676509 - 2⁴ = 676493 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

676509 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 676509.

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 676509.

It is not an unprimeable number, because it can be changed into a prime (676589) 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, 112749 + ... + 112754.

It is an arithmetic number, because the mean of its divisors is an integer number (225504).

2⁶⁷⁶⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

676509 is a deficient number, since it is larger than the sum of its proper divisors (225507).

676509 is a wasteful number, since it uses less digits than its factorization.

676509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225506.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 676509 is about 822.5016717308. The cubic root of 676509 is about 87.7858515365.

The spelling of 676509 in words is "six hundred seventy-six thousand, five hundred nine".