676309 has 4 divisors (see below), whose sum is σ = 699660. Its totient is φ = 652960.

The previous prime is 676297. The next prime is 676337. The reversal of 676309 is 903676.

676309 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.

It can be written as a sum of positive squares in 2 ways, for example, as 334084 + 342225 = 578^2 + 585^2 .

It is a cyclic number.

It is not a de Polignac number, because 676309 - 2⁹ = 675797 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (676339) 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, 11632 + ... + 11689.

It is an arithmetic number, because the mean of its divisors is an integer number (174915).

2⁶⁷⁶³⁰⁹ is an apocalyptic number.

It is an amenable number.

676309 is a deficient number, since it is larger than the sum of its proper divisors (23351).

676309 is a wasteful number, since it uses less digits than its factorization.

676309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23350.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 676309 is about 822.3800824436. The cubic root of 676309 is about 87.7771998158. Note that the first 3 decimals are identical.

The spelling of 676309 in words is "six hundred seventy-six thousand, three hundred nine".