679505 has 8 divisors (see below), whose sum is σ = 837672. Its totient is φ = 528768.

The previous prime is 679501. The next prime is 679517. The reversal of 679505 is 505976.

679505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 53824 + 625681 = 232^2 + 791^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 679505 - 2² = 679501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1652 + ... + 2021.

It is an arithmetic number, because the mean of its divisors is an integer number (104709).

2⁶⁷⁹⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

679505 is a deficient number, since it is larger than the sum of its proper divisors (158167).

679505 is a wasteful number, since it uses less digits than its factorization.

679505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3715.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 679505 is about 824.3209326470. The cubic root of 679505 is about 87.9152507078.

The spelling of 679505 in words is "six hundred seventy-nine thousand, five hundred five".