679569 has 8 divisors (see below), whose sum is σ = 988512. Its totient is φ = 411840.

The previous prime is 679561. The next prime is 679597. The reversal of 679569 is 965976.

679569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 679569 - 2³ = 679561 is a prime.

It is a super-2 number, since 2×679569² = 923628051522, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 679569.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679561) 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, 10264 + ... + 10329.

It is an arithmetic number, because the mean of its divisors is an integer number (123564).

2⁶⁷⁹⁵⁶⁹ is an apocalyptic number.

It is an amenable number.

679569 is a deficient number, since it is larger than the sum of its proper divisors (308943).

679569 is a wasteful number, since it uses less digits than its factorization.

679569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20607.

The product of its digits is 102060, while the sum is 42.

The square root of 679569 is about 824.3597515648. The cubic root of 679569 is about 87.9180107559.

The spelling of 679569 in words is "six hundred seventy-nine thousand, five hundred sixty-nine".